• diymmi Do It Yourself Motor Mount Inserts - Liquid Urethane
  • diymmi Do It Yourself Motor Mount Inserts - Liquid Urethane

Do It Yourself Motor Mount Inserts - Liquid Urethane

Manufacturer: DST
Part Number: diymmi


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DIY Liquid Urethane Engine and Motor Mount Inserts

  • 1 of Urethane
  • 1 of Activator
  • 1 of Stirring Stick
  • 1 of Installation Instructions

"Do It Yourself" Motor Mount Inserts Kit

Why Use Motor Mount Inserts?

  • Increase Horsepower to the Ground
  • Reduced Wheel Hop
  • More Responsive Motor

The first and foremost reason for firming up your motor mounts is to hold the engine more firmly in place. Often the more pliable stock motor mounts will allow the engine to move too much - resulting in wheel hop and a loss of power. The more extreme version of this is when an owner has increase the vehicle's horsepower more than the stock motor mounts were meant to handle. This can cause tearing the stock motor mounts as well as damage to the engine and engine bay should the engine be allowed too much movement.

Liquid Urethane Motor Mount Replacements

Liquid Urethane Motor Mount Replacements

Will This Kit Work on My Motor Mounts?

The mounts you're working with MUST have voids in them like the mounts shown here. These voids are what you will be filling with urethane. Without voids - there is nothing to fill! Most FWD vehicles will have several mounts designed like this.

Where's the rest of it?

Much like a new bag of potato chips the liquid urethane can is only about half full. As long as the can is sealed when you receive it you can rest assured that none of the product is missing.

Liquid Urethane Motor Mount Replacements

Which Mounts Should I Use?

Most FWD vehicles have several different motor mounts - typically from 4-5 mounts. Some of the motor mounts are designed significantly different from the others. TORQUE mounts are the motor mounts designed to reduce the amount of engine movement when power is applied. Main Mounts are the mounts designed to support and hold the weight of the engine.

TORQUE mounts are the most effective mounts at providing a great rigidity to the engine assembly without transmitting as much natural vibration to the driver. Torque mounts are typically located at the front and or rear of the engine. Main mounts are typically located higher on the engine assembly as the engine weight usually hangs from these.

While it is typically possible to firm up all the mounts on a vehicle - the torque mounts will provide the best trade off of performance and vibration.

What is Required to complete this Project?

Liquid Urethane - available in 60A, 80A or 94A

The following items are not included in this kit and must be purchased at a local hardware store. These can be purchased for approximately $10

  • Duct Tape - Seals one side of the mount
  • Contact Cement - Helps the duct tape seal against greasy surfaces
  • Degreaser - Cleans the mount of grease and oil to ensure an easy project
  • Sand - in a box - vital to the project - don't skip this one.
  • Level - using a small level will ensure your mount is level in the sand
Liquid Urethane Motor Mount Replacements

urethane to rubber primer

Want the best Urethane bond possible?

After cleaning the rubber you can use a special Urethane-to-Rubber Primer or combine it with an Adhesive to enable the tightest bond possible.

The Primer can be used by itself in this application or combined with the Adhesive depending on how secure you feel the urethane needs to be. The project can be completed without these additions, but they will help the binding process.

What Level of Hardness should I use?

There are a number of firmness or "durometer" levels offered. The default is 80A as it's the most used and most popular. These are:

  • 60A - For the Daily Driver - This is the softest formula offered that will still make a noticeable difference in vehicle performance. This softer formula is best for tuners that still want to increase performance without trading off as much personal comfort.
  • 80A - Even trade off between performance and vibration when it comes to motor mount inserts. This formula is the most popular for it's ability to significantly increase vehicle performance while still allowing some small amount of flex in the mounts to keep vibration and noise to reasonable levels
  • 80A High Performance - an improvement on the already great 80A offers more heat resitance and a higher tear rate without adding noise and vibration
  • 94A - Race Quality - Not for the daily driver. This formula is the hardest of the 3 available. Providing the best reduction in motor movement - this version will also allow a rather significant amount of engine vibration to be transmitted into the vehicle.
Liquid Urethane Motor Mount Replacements

Liquid Urethane Motor Mount Replacements

How Fast does the Polyurethane Cure?

At room temperature the polyurethane cures in about 7 days. You can accelerate this process by curing your mounts at 150 degrees Fahrenheit. Doing this decreases the cure time to about 18 hours.

Is one kit enough to complete my project?

This kit produces about 13.52 fl oz (400 mL) of Liquid Urethane. On most vehicles this will be enough to complete the project on ALL the mounts. This product has been proven to work well for creating motor mount inserts and lasting for the life of the mount.

Where can I find the installation instructions?

The installation instructions for this product can be found in our How-To - Liquid Urethane Motor Mount Replacement Insert Blog

Liquid Urethane Motor Mount Replacements

Instructions - DIY Motor Mount Inserts

For a full breakdown and How-To Video visit our How-To - Liquid Urethane Motor Mount Replacement Insert Blog

Prepping The Mounts

Step One - CLEAN!

For the urethane to bond correctly and to ease the overall process - the mounts must be thoroughly cleaned of grease and dirt. A little cheap degreaser can go a long way over simple soap. Take the time to use real degreaser - it's usually just a spray on - spray off process anyway.

Do It Yourself Liquid Urethane Motor Mount Replacement Clean

Step Two - Sealing One Side

The motor mount inserts are made by pouring a liquid urethane into the voids of the mounts and allowing it to dry. In order to do this you'll need to completely seal off one side of the mounts. When you first pour the urethane into the mounts it will have a very liquid consistency. Even the smallest hole in your sealing jobs will allow the urethane to seep out.

Do It Yourself Liquid Urethane Motor Mount Replacement Cement
Do It Yourself Liquid Urethane Motor Mount Replacement Contact Cement

The best way to do this is with some contact cement and duct tape. While duct tape alone will usually work - the contact cement will ensure a good seal - especially if there's any greasy residue on the mounts (the tape will not adhere properly). Start by painting the outside edge and inside circumference of the side of the mount you're going to seal off - with contact cement. Anywhere you need to be sure there's a good seal - use this liberally - you'll be able to pull/scrape it off later.

Once you've set a good layer of contact cement, seal off the mount with the duct tape. Use several strips of tape at different angles from the center of the mount. Continue adding tape around the center of the mount until you've sealed it off completely. Some users wont have the center piece sticking out of one side and won't have to work around it - either way just keep adding tape until it's properly sealed off.

Duct tape is cheap - so use as much as necessary before you feel good about the job - then add a little more.

Do It Yourself Liquid Urethane Motor Mount Replacement Tape Start
Do It Yourself Liquid Urethane Motor Mount Replacement Tape

Setting Up the Mounts

It's important that the mounts are completely level before you pour the urethane into them. If they're laying at an angle the mount will not turn out right.

Prepare a small box of sand for the mounts. Setting the mounts into the sand will: 1) Allow a perfectly level placement - even if there are protrusions from the mounts that would otherwise make it sit screwy, and 2) Help seal off any small holes in your sealing job. If the hole is small, a little urethane will leak out into the sand and the sand will help it congeal faster - effectively sealing the hole in the mount.

Do It Yourself Liquid Urethane Motor Mount Replacement Sand
Do It Yourself Liquid Urethane Motor Mount Replacement Level

DO NOT attempt to do this without the sand box. While it is possible to do so - using the sand box will help ensure you do the job right the first time. Once you mix the urethane, you'll only have 15-20 minutes of working time before it's too firm to work properly with. You won't have enough time to decide you SHOULD have used the sand box.

Mixing the Urethane

DO NOT DO THIS UNTIL YOU'RE 100% Ready to Pour!

The correct mixing ratio is absolutely VITAL to the urethane setting correctly. That's why each set comes in a pre-measured container. Do not attempt to use only PART of a kit - doing so may cause the urethane to not set correctly

Each kit should include:

  • Urethane - in the hardness level you ordered. Comes in small paint can style container
  • Activator - a very liquid substance in a small bottle
  • Stirring Stick
Do It Yourself Liquid Urethane Motor Mount Replacement Contents

Before doing ANYTHING with these substances read through all the warnings and adhere to them! Most importantly - mix and use these outside in a well ventilated area.

Remove the lid from the larger paint can containing the urethane and set it aside. Take the bottle of activator and shake it well before adding it to the urethane.

Do It Yourself Liquid Urethane Motor Mount Replacement Open
Do It Yourself Liquid Urethane Motor Mount Replacement Mix

Thoroughly mix the activator and urethane with the provided mixing stick. Be sure to scrape the sides of the can and even scrape off the stirring stick to ensure you've mixed all of the urethane in with the activator.

Once you've mixed the urethane and activator you're ready to pour it into the mount! Once the urethane is mixed you only have about 15-20 minutes where it's pour-able!

Do It Yourself Liquid Urethane Motor Mount Replacement Stir

Pouring the Urethane

Slowly pour the mixed urethane into the open side of the mounts. Allow for the urethane to fill all the voids in the mount. It may take a minute for it to settle completely flat - so take your time. If it seems to be leaking out a LITTLE - don't panic - the sand will help clot up the hole and slow the leak.

Fill the mounts to the top - it's even OK if some spills over the outside edge.

Do It Yourself Liquid Urethane Motor Mount Replacement Pour
Do It Yourself Liquid Urethane Motor Mount Replacement Last Pour

Once the mounts are full wait about 10 minutes. In 10 minutes the urethane should still be very liquid and you can top off the mounts with the remaining urethane in the can. This is particularly important if you have a small leak in the sealed side of the mount. Don't wait longer than 20 minutes to check up on the mounts as by that time the urethane will start to become less workable.

A Job Not So Well Done

It is very important that you use sand. If you do a poor job of setting up the mount in your sand, your results can be disastrous. If there is any type of hole in your seal job, the urethane can seep out. The sand can stop that, so be sure to pack the sand under the mount in order to clog any leak. If not, you get this:

Do It Yourself Liquid Urethane Motor Mount Replacement Bad Sand
Do It Yourself Liquid Urethane Motor Mount Replacement Bad

If the urethane seeps out like this, you're final product will be less than desired. Check out the mount we did with a poor sand job:

The Finished Product

By the next day you should be able to take the mounts out of the sand box and remove the tape from the opposite side. Sometimes if you had a small leak you'll find small clumps of sand attached to the other side - these pry/peel off easily and will not affect your new mounts.

Do It Yourself Liquid Urethane Motor Mount Replacement After1
Do It Yourself Liquid Urethane Motor Mount Replacement After2

The tape should pull off easily and if you want to clean them up further you can scrape off the left over contact cement - however if you really don't care too much you could even leave the tape on - it won't hurt anything.

Do It Yourself Liquid Urethane Motor Mount Replacement After3

Finished "Do It Yourself" Motor Mounts

Do It Yourself Liquid Urethane Motor Mount Replacement final1

Additional Notes For Users

Some users have asked if this will work for their mounts if the center portion has completely torn away from the rest of the mount. The answer: YES! The only additional consideration is the correct centering/alignment of the mounting point that goes through the mount. While the sandbox will make it significantly easier to do this - special care will be needed to ensure centering and alignment.


In using these instructions and urethane kits you accept complete responsibility for the outcome of your project. Only you can ensure this is done correctly and we will not be held responsible if your mounts do not turn out like you wanted.

A significant amount of information has been provided here - however some projects may be unique and will need special attention or a different mode of creation. While we're happy to help with any questions - we cannot guarantee the outcome of your particular project.

You may not copy, post or reproduce this "How To" information or pictures without written consent from Diverse Suspension Technologies.

Do-It-Yourself Mount Mount Inserts

DST diymmi

Product Reviews for Motor Mount Inserts diymmi

DST diymmi

5 out of 5 based on 79 user reviews. Write a Review

Urethane has softened a bit, but holds up well to driving abuse and high temps.
5 out of 5 - Review 2 Years Later
Frank Rusciano - . DST diymmi
I did not use this product as intended. I used it to make my cheap rifle stock more rigid by filling voids with your product. It was a polyurethane stock (.308 cal) and has not failed after 2 hunting seasons and a few hundred rounds. Im greatly satisfied with the product.
5 out of 5 - Review 2 Years Later
Edwin Serrano - . DST diymmi
Graduations on containers would be nice for mixing multiple batches .I had to discard 2/3 of material due to time constraints . I like the product .
5 out of 5 - Easy to use ,just wish I could have mixed a small batch .
Bruce Vanderhoof - . DST diymmi
At first i had doubts cuz the claims are just too hard to believe. But 2 years after installing this on my busted motor mounts and they still look like they could hold up for another 10 years at least. Great product. Worth every penny.
5 out of 5 - Review 2 Years Later
Albert ta - . DST diymmi
Worked as expected.
5 out of 5 - Product was as described.
George Muszik - . DST diymmi
I got the 80A DIYMMI kit a few years back for my Honda. Kit filled 3 of my 4 mounts, I let it cure the week. Installed and it was night day difference. I did get a bit of vibration in the cabin but did fade away some after a few months. 0 engine movement. So I recently ordered another kit in 60A for my daily HONDA. Again i got 3 out of 4 mounts done, only because they were fill-able, 1 was not. Still good enough. Again it mixed and poured well. And feels great. Not as much vibration as the 80A kit on the my 1st Honda I used it on. Nonetheless, a great DIY kit. Beats spending $250+ on name brand performance mounts out there.
5 out of 5 - Lovely!
Alvin - . DST diymmi
Great product for me because I couldnt locate any mounts for my old truck so rebuilding was the only option.\nThe product was slightly more viscous than I anticipated causing some anxiety while pouring as it didnt flow into the voids in the mount as well as I hoped. But if I was to do it again with that knowledge they would have turned out perfect. I would suggest this to anyone, thumbs up.
5 out of 5 - Looks great, seems like it is going to be very durable.
Todd Bitz - . DST diymmi
Product works great, would highly recommend.
5 out of 5 - Review 1 Year Later
Joel Wagner - . DST diymmi
Worked as advertised! Absolutely recommend this product for custom work.
5 out of 5 - Review 2 Years Later
Joshua Pianowski - . DST diymmi
Love this product, I made a mold from my old mount and poured a new and it is still standing up and it was a fraction of the price for race mounts let alone trying to find one for my f 150 . The only thing is I wish there was a little more in the can I only got about 1.5 motor mounts out of it but over all very happy.
5 out of 5 - Review 1 Year Later
chad morris - . DST diymmi
I cast a new bushing for a Ranchero adjustable shock absorber on the rear of a 2002 Dodge 1500 pickup. It is set 3 clicks from full soft which is still firmer than stock shocks (useless). Has lasted a year of moderate use. So far so good. Expensive for a new bushing (unavailable) but cheaper than a new shock which would not match the action of three older shocks. Interesting experiment.
5 out of 5 - Review 1 Year Later
John A. Burnett - . DST diymmi
Excellent Product That Has Many Uses!\nYou can really make custom parts by using a small grease gun (one time use only) if you need to inject the material.\n \nJust Where Gloves!
5 out of 5 - Review 1 Year Later
Steven Larmann - . DST diymmi
Worked very well for replacing rubber in a shock mount.
5 out of 5 - Very easy to use
Paul Higgins - . DST diymmi
Bought this DIY kit and is pretty easy. Not complex at all. Im very happy with the results definitely a bang for the buck kit.
5 out of 5 - Amazed
Jean Berrios - . DST diymmi
Worked as expected.
5 out of 5 - Product was as described.
George Muszik - . DST diymmi
No change since installed. Great product.
5 out of 5 - Review 2 Years Later
Michael J Simpson - . DST diymmi
Great product for me because I couldnt locate any mounts for my old truck so rebuilding was the only option.\nThe product was slightly more viscous than I anticipated causing some anxiety while pouring as it didnt flow into the voids in the mount as well as I hoped. But if I was to do it again with that knowledge they would have turned out perfect. I would suggest this to anyone, thumbs up.
4 out of 5 - Looks great, seems like it is going to be very durable.
Todd Bitz - . DST diymmi
My Honda Ridgeline eats through rear motor mounts. I decided to order a new one, and fill the empty space between the mount rubber and the metal mount casing with this urethane. I mixed it per instructions (BY WEIGHT, NOT BY VOLUME!!!) The part was cured in 24 hours and ready to install. I however waited a full 7 days for full cure prior to install. The rear mount on my vehicle is directly above the exhaust pipe, so time will tell if this urethane can stand up to the heat. So far so good. I believe the heat is what causes the OEM mounts to break down. \nOverall I love this product, and will use to strengthen all other mounts!
5 out of 5 - Good product, cures quickly with proper mix ratio
Instructions were straight forward and easy to comprehend. Used this polyurethane for control arm bushings on a mk5 jetta. Looks like I might have had enough left over to pour a second pair of bushings.
5 out of 5
Dusan Ablai - . DST diymmi
Graduations on containers would be nice for mixing multiple batches .I had to discard 2/3 of material due to time constraints . I like the product .
5 out of 5 - Easy to use ,just wish I could have mixed a small batch .
Bruce Vanderhoof - . DST diymmi
Product is great, application is pretty straight forward and very detailed in the instructions. Product was a bit thinner than expected and took a good time to set. I poured test strips and would highly recommend waiting 4-7 days for a good cure before installing as the test strip were a bit weak 48 after cure but very strong and almost impossible to tear by hand. I ordered the 80A because Im hard on my vehicle and was willing to trade the vibration for performance, reliability and longevity. I would recommend 60A for most daily drivers or those who just want a stiffer mount.
5 out of 5 - very satisfied with the product
William Gallagher - . DST diymmi
I modified the front motor mount on my Chrysler Town and Country. Much better throttle response at the cost of added vibration at idle in gear, which seems to have lessened over time. It feels more like a truck now, definitely not for everyone. I bought this to modify some mounts for my PT Cruiser Turbo with A/T to be softer than the solid urethane mounts in it now. I will install them when I change the timing belt. Its nice to have the option of making softer or harder mounts as desired.
5 out of 5 - Review 2 Years Later
William P. Pete - . DST diymmi
Turned out to be easier than I thought. Very easy to follow and had detailed instructions. Sandbox made it easy to handle and cured in a day. Thanks.
5 out of 5 - easy to use, clear instructions
After two years, the motor mounts that I filled with this polyurethane are still going strong. I love the way the car responds and Im happy I went with this product
5 out of 5 - Review 2 Years Later
Matthew Kanda - . DST diymmi
Used on 4 motor mounts, installed at different intervals. The first two were installed after only sitting a couple of days. They eventually showed signs of cracking/etc, but for the most part they are filled. Of the other two, one mount I had ordered online and received the wrong one, so I couldnt use it.... but the mount I installed on the car after hardening for a month is still as strong/solid as day one. \nNext time Ill clean em a bit more, and wait longer before installing, but I definitely recommend this to everyone. My engine sounds different, there is more vibration but my shifting is greatly improved; a must have mod imo.
5 out of 5 - Review 1 Year Later
Anthony Redmond - . DST diymmi
It was a good product overall. I found them very helpful in eliminating all that movement from my engine and transmission. Good product overall.
5 out of 5 - Nice
Jose Luis Vazquez - . DST diymmi
Great product. Used in my old motor/transmission mount. They were rotted thru. Made a jig, pour these over. Let cure. Re-install like a champ!
5 out of 5 - Would use for a lot of things
Alex - . DST diymmi
I got the DIYMM for my torque mount on my 2014 Sonic RS. I used the 80 and its great! At first I felt all kinds of vibrations but after 1000 or so miles it started to fad away. I still have some vibrations but not much. Hardly noticeable unless my AC is on at idle. Motor movement is now minimal. I tuned and did a couple things to the car which caused the motor to move a lot when I was driving around city, but now its great. I do recommend to any one looking for a cheaper proformance upgrade. I do recommend cutting out parts of the original mount that can be cut out. I wanted to have as much of the filler in there as I could fit. I gave it a 4 rating because it comes with a lot and I wish it was less so I could just fill one mount at a time and not waste more than half of what came.
4 out of 5 - Great!
David - . DST diymmi
5 out of 5 - excellent
Fernando Freitas - . DST diymmi
I made a solid mount from my existing SRT-4 trans mount. I used some wax as a release agent, some foil tape to seal/form transitions and a plastic yogurt lid for the bottom. I had some leakage, but if I was to do it again, I would seal the tape joints with wax on the outside. I also used a mill to cut more of my OEM insert down so I could get more DIYMMI in the mount. Seeing that I made a very large solid mount, I would have gone with the softer product to mute some of the vibration, which was my fault. I like the DIYMMI and will use it again. I also only used half as not recommended, but I weighed each part out on a scale to make user I got the correct blend.
4 out of 5 - Good
robert maersch - . DST diymmi
I would have loved to give a review, but the material was not going to work for my application. The swaybar links on my 2001 excursion are more complex then anticipated!
5 out of 5 - Unknown
Christopher j kaminski - . DST diymmi
Wish they had instructions on mixture. The mounts never dried completely.
5 out of 5 - not good
mike aponte - . DST diymmi
The product is easy to work with and the money i spent as far as making the motor mounts better. I would recommend this product for anyone that wants to stiffen up their motor mounts, but is on a budget or cannot justify spending 3-4x the amount on pre-made aftermarket ones. Just follow the instructions and youll have a product that turned out great too.
5 out of 5 - awesome product!!!!
toua xiong - . DST diymmi
still going strong, no issues
5 out of 5 - Review 1 Year Later
John Brown - . DST diymmi
Hi, yes I used them, wasted some of the material as instructions where limited. I discovered that if you let it set up some it will make pouring into old motor mount better and will stay where you put it. I used it too soon so a lot of the material ran out and was lost. I did get the 2 most important mounts to take and actually came out well. They are in the car I am driving now and seem to work good. I will buy and use this product again when I need to. I would recommend putting better car use motor mount instructions in there. I would recommend this product to my friends
5 out of 5 - Review 1 Year Later
david brown - . DST diymmi
For those that are tired of replacing side torque engine mounts this diy kit makes it easy to fill your mounts for a permanent solution. Just make sure to clean the mounts properly and set them in sand while they set overnight. Initial results are great although they will add a slight increase in cabin vibration and should be considered when filling your mounts. The performance gains are noticeable with very minimal side to side engine movement resulting in increased traction.
5 out of 5 - Great product
Brad Hessels - . DST diymmi
Takes a while to do this right and set everything up, but the outcome is nice! I did my rear diff mount with 80A and have no problems. Its a money saver when some mounts cost $200+
5 out of 5 - Good
Kamil Pasek - . DST diymmi
very efficiency for my silent block strengthening. Good product!
5 out of 5 - very good product and efficiency
LABEAU Eric - . DST diymmi
The concept behind the DIY motor mounts was a huge help! I followed most of the DIY procedure listed on this website when pouring the bushing in the transmission mount on my 2013 Mustang GT. I did vary a little bit though in that I had a jig custom made to hold the mount in place while I poured the bushing. The quality of the liquid polyurethane product far exceeded my expectations and was very easy to work with. Note: It was necessary to use a mold release in order to separate the transmission mount from the jigs backing plate. I used a carnauba paste wax for the mold release.
5 out of 5 - Great
Adrian Mansaw - . DST diymmi
The liquid urethane worked well and was easy to use. There was enough for the rear links and front swaybar links of my Pathfinder.
5 out of 5 - Good
BeerGarage - . DST diymmi
I used this material to fill the rear upper shock mounts on a Ford Focus. I used the soft version, and it worked perfectly to eliminate the air gap, but leave some road isolation in place. I used just enough to fill the mounts, so I have a bunch left over for future projects.
5 out of 5 - Works great
Wayne Bengston - . DST diymmi
Turned out to be easier than I thought. Very easy to follow and had detailed instructions. Sandbox made it easy to handle and cured in a day. Thanks.
5 out of 5 - easy to use, clear instructions
I was able to fill four engine mounts and one exhaust pipe hanger mount. Everything turned out great! I just finished installing the engine in the car and I had no issues with any of the mounts.
5 out of 5 - Great Product !!!
Robert Timmons - . DST diymmi
Ive used this for 2 cars already and is just as good as the $400 ones if u have the time and skills completely worth it
5 out of 5 - Works just as advertised
Danny lugo - . DST diymmi
Very easy to mix and pour,it was enough to pour 2 mounts. I used the 60A formula,Seemed really solid and hard and rubbery but when I installed it,My car ran great and not a rough ride at all. I would recommend this product
5 out of 5 - 5 star
Andrew Frazer - . DST diymmi
My car is currently in the build stage so I cannot comment on the performance aspect of this product but I was very satisfied with the ease of use and the appearance of the finished product. Shipping was fast and customer service was definitely on que!
5 out of 5 - Satisfied
Joshua neathery - . DST diymmi
This product was exactly as described on website. I would really like it if urethane was available in a quality twice this size. Overall I will definitely buy again. Thanks for making a product like this available for the common person.
5 out of 5 - very nice
James D. Crites - . DST diymmi
Massive improvement....although expect to have to tighten everything up under the dash and engine bay because the extra vibration will loosen everything up! Awesome product!
5 out of 5 - Good!
Joshua Fraser - . DST diymmi
I ordered this to use on my turbo eclipse. Turned out very nice.
5 out of 5 - excellent product
Steve rider - . DST diymmi
The liquid urethane worked very well. I was able to do 3 motor mount on my Dodge Spirit R/T and there was enough leftover to do at least one more if I needed. You cant store it so you have do it all at one time. Preparation is everything.
5 out of 5 - Great product.
Skyler Doggins - . DST diymmi
I haven't got them installed yet but they are made and fully cured. They look great and are rock sold. Made 3 out of my 4 mounts and could have made the 4th just didn't want to. Great product at a great price I highly recommend this to anyone who want a cheaper alternative to mount inserts.
5 out of 5 - essy to do... rock solid mounts...
Gregory trahan - . DST diymmi
I installed this on a 2007 Ford Freestyle and a Ford ZX2. It exceeded my expectation. I have more power getting to the wheels and less movement in the motor and trans assembly. The ZX2 does know have a slight vibration from the stiffer mounts but I have noticed that it is lessoning every day. I don't expect it to fully go away but for what I was needing it is perfect.
5 out of 5 - very good
David Stringer - . DST diymmi
I received the product promptly, within 2 days of ordering. I followed the instructions on the website and made sure I had the extra supplies.(Duct Tape, Contact Cement, Industrial Degreaser, and Sand in a box)I removed the mounts, cleaned them really good with a scrub brush and the degreaser, then contact cemented and duct taped one side of the mounts. I then set the mounts in an old plastic box I filled with sand. One tip I might add here is to make sure your box fits the mount entirely, I had to rig up a brace outside of the box and build up the sand so one of the mounts was level. The mount in question was the top torque mount on a 2007 Ford Five Hundred, which is a giant metal bracket with a small round mount at the top. Just be aware of the size of your work space compared to the part you're working on and it will be a lot easier. After the mounts were placed and level(verified with an actual level) I mixed up the pre-measured hardener in the can the urethane came in, making sure to follow the mixing instructions also on the website. Then slowly poured into my mounts to ensure good coverage and no air bubbles. The cure instructions say to wait 48 hours before re-installing the mounts. I have read some installations that were fine after 1 day but I was able to leave mine for 2 days straight. If possible just wait the two days to be sure. After re installation I did notice way more vibration in the steering wheel and dash than before, even considering the shoddy state of the mounts before this repair. I used the 80A durometer version of this kit. If you're looking for silky smooth stock like performance and vibration levels, go with the softer 60A kit. The amount of compound your given could easily fill 3 or 4 mounts the size of hockey pucks. I didn't know what to do with the rest so I poured it into an aluminum food warming dish and made a urethane plate, just to see what the stuff was like! The only recommendation I would make to Energy Suspensions is to include that list of recommended supplies or a link to a webpage with a pdf or easily downloadable/printable instructions. Luckily I have a laptop I don't mind getting bit grungy so I was looking at the website while doing all of this. Having said that and knowing that its 2012, not everyone has easy access to a computer. In the end this was the most painless way I could have possibly repaired my cars torque mounts. Even with all of the extra materials I had to buy, I still paid a fraction of the cost of a new top torque mount for my car and I was able to repair my bottom torque mount at the same time! So grab a couple of cars worth of torque mounts, have everyone pitch in for the materials, and spend a weekend hanging out while your mounts set. You could seriously save yourself some cash and have a really effective mod at the same time. Plus its a great excuse to sit back and drink beer for two days.... Sorry "otherhalf," cant go anywhere, my mounts are setting...
5 out of 5 - Absolutely Awesome Product
Scott Grunow - . DST diymmi
Overall a great product. My experience with it was interesting in that I wasted the first can due to not having taped it up well enough. After producing results I wanted from this, I offered using this product to people I know, not just for motor mounts but also transmission mount. There is not transmission mounts inserts for early 94's. I've been making these as well.
5 out of 5 - great!
Timothy John Middleton - . DST diymmi
The product came with easy to read instructions and went well. My blown out mount hasn't given me any trouble since and this saved me a lot of trouble because my car is old and has mismatched parts making it hard to find new replacement parts. This eliminated that problem.
5 out of 5 - nailed it!
John Paul Landry - . DST diymmi
Worked exactly as advertised and stated in instructions. Only mistake I made (which is not addressed in instructions or reviewer comments) was not putting one of the motor mounts in its mounting bracket prior to using this material - as a result the mount was not squish-able enough to fit inside the bracket so we had to drill holes in it to create enough room.
5 out of 5 - excellent
douglas a watt - . DST diymmi
This product is great just follow the instructions and everything will be ready for use in a few days, in my case the place in the sun for 2 days and the finish was fantastic, some vibrations but nothing major Thanks.
5 out of 5 - Good Good
Oliver Ferreira AP-026650 - . DST diymmi
I use one of these kits on my sons motor mounts, once it's fully cured even the soft formula is fairly stiff. The down side is that it took 4-5 days to cure completely. I believe that's the main problem some are having with it; it's not fully cure when they reinstall the mounts.
5 out of 5 - good product!
Ron - . DST diymmi
I've heard people complain about vibration. but i have the 94a and it's not that bad. When I first put in the urethane into my mounts, it was harsh. But the mounts have broken in and there is still some vibration. But compared to my old rubber mounts...no contest. These are way better. Shifting is better. Power to the ground is nicer. The motor doesn't rock like it used to when the old mounts were in. But if you really don't want vibration and you're just looking to have something last for a very long time, I'd say go with the 60a.
5 out of 5 - love it
paul tinoso - . DST diymmi
This product and this company are both great to work with! A little time and prep and less than $40 and I've got 3 solid mounts that look and function as good or better than anything I could have purchased new! Mix it up. Pour it in and the next day, bolt em on looking just like in the picture! AWESOME!!!!!
5 out of 5 - Great Product!!!!
Seth Johnson - . DST diymmi
Product worked as promised. Used the Liquid Urethane on my son's motor mounts on his Acura Integra. Worked great. No more vibration.
5 out of 5
john koester - . DST diymmi
I AM VERY IMPRESSED WITH THIS PRODUCT. I will never again buy new motor mounts. The reason I bought these was because I bought new o.e autozone parts. They were too soft. My intake manifold was hitting the firewall. Mind you, these are new out of the box mounts. New one from the dealership where too expensive, so I bought the polymer kit, and wow. I told all my friends on socal honda tuner, and they were impressed too. Follow the directions, and they will look as good as their own pictures. Great product and great price in my opinion. For an oe ride I would go with their softest one they carry. I bought the mid-level and my little crx gets all the H.P. down to the wheels....
5 out of 5 - lets just say WOW!
inda ceja - . DST diymmi
This is a great way if you cannot find mounts or inserts to toughen everything up. Follow the directions exactly. I had no problems with the procedure. Awesome. The only thing I recommend if your mounts are old and flex to begin with then get new ones and then do the procedure with the polyurethane. It also works better because there is less down time with the vehicle. Take the old out and install the new ones and your on your way. I installed it on a 1996 nissan altima and used the mid grade stiffness. Didn't result in anymore vibrations that I didn't have before. Thank you for coming up with something like this it wasn't hard to do and worked fantastic. Would def. recommend to any one.
5 out of 5
michael calderaro - . DST diymmi
Yes I have installed the DIYMMI on 3 different cars (3 kits) - Honda CRX 1987 AS53 - Honda CRX 1989 ED9 - Honda Civic 1994 EG4 All is working very well... in 60A. I chose, as I use these cars every day, that rating of hardness. It is a quiet good compromise between Comfort & Performance. Actually, you have the engine "present" inside the car when @idle, when you are on road @different rev speeds, it is really OKAY ! Whereas for the performance, you don't have, mainly on little engines like D15B2 (1.5 16v 90hp), any losses of power or, and it is the best : torque ! The engine and transmission is in DIRECT contact with the road; there is no lag between the moment that you push your pedal and the moment that you feel the torque pushing you in the back of your seat. This liquid urethane is easy to install, the only difficulty is to dismount them from the engine bay, you have to attach all your motor group. Just followed the electronic manual available on energy suspension parts website, but did not use any sand, only scotch ! Made some pics of the installation on a topic that I maintain for my OLD CRX : http://www.japancar.fr/forum/viewtopic.php?t=156895&postdays=0&postorder=asc&&start=30 Feel free to ask any question. PS : Im French.
5 out of 5 - Real GOOOOOD !
CharlyCRX - . DST diymmi
Great product works very well and the instructions were very helpful on completing this project.
5 out of 5 - Great product.
Andrew Warner - . DST diymmi
I have a 91 Mazda 626 turbo hatchback, for which only Mazda seemed to have the proper right-side motor mount, and it cost too much for my taste. The instructions that came with the poly material were spot on; I did what the instructions said and the results were perfect. I chose the 60 durometer material because this is a daily driver, and Ive noticed no increase in vibration, but the motor no longer tries to torque itself out of the car. I only wish Id pulled the left-side mount and filled it at the same time. -- BJ
5 out of 5 - Works absolutely as advertised.
BJ Fisch - . DST diymmi
I have recommended this upgrade on my civic forums. It was night and day. I had bad wheel hop before and now all I have is acceleration! Will be back for the full suspension kit. Thanks for the good service.
5 out of 5 - this is the best upgrade i have installed!
Andrew Ferguson - . DST diymmi
Easy to install and cheaper than buying new mounts. This is actually better than mount inserts. You don't get that annoying squeak.
5 out of 5 - great
Nathan Watts - . DST diymmi
The liquid urethane did the job and made my mounts nice and firm. So 5 out of 5. Also it was very easy to use with little mess. Definitely recommended.
5 out of 5 - Very good stuff.
Kenny Wong - . DST diymmi
comes in can and appears a little stiff untill you add the activator. i used it to fill motor and swingarm bushings on my 2006 XL883c harley davidson. a common complaint is the added engine and swing arm movement of the rubber mount sportsters. now it is like the soild mount bikes of the previous years and still has a very little more buzz than the stock mounts.
5 out of 5 - A+ many uses
julius long - . DST diymmi
The product is great...as firm as i wanted it to be ( 94A ) way to firm for street tho. Only down side: you have to work fast with the product...and if i would have to do it again i would drill some holes in the rubber of the original mount to help the product to go trough and fill up the motor mount faster and easier. But overall is easy to use and the result is amazing. I just have to see if it lasts long enough now with all the drag racing those motor mount are seeing right now !
5 out of 5 - awsome product
Jonathan Savaria - . DST diymmi
Product is excellent, only thing that could be better is product drying time. Product gets stiff very slowly. Thanks, Esa
5 out of 5 - Positive feedbac
Esa Asikainen - . DST diymmi
Used the 94A to fill the trans mount on my 05 GTO since we have no poly inserts available,it made a dramatic difference,the shifter moves much less under hard accel....the vibration increase is there but it will not bug you
5 out of 5 - Great product
Cy - . DST diymmi
5 out of 5 - LIQUID URETHANE
SAUL DIAZ - . DST diymmi

Product Reviews for DST Motor Mount Inserts

I have purchased two of the liquid polyurethane products now, the 60A, and the 80A. I made a motor mount out of the first batch of the 60A, and with less than a thousand miles on it the poly failed. The steel sleeve completely tore through the poly and is now sitting on the bottom of the metal mount. Its only a 4-cylinder motor too. I made the second motor mount from the 80A and Im waiting to see if that one holds up, its only been installed for about 50 miles. I also made some custom lift spacers for the rear of a 2005 Grand Cherokee with the 80A, and it is holding up well so far in that application.
1 out of 5 - Motor mount failed
Jason Cooley - . DST diymmi80ablack
Awesome product. Its bonding power is amazing!!!
5 out of 5 - Review 1 Year Later
Chad Linden - . DST diymmi94ablack
It will be enough for 3 mounts if they are small.
5 out of 5 - Good
Anselmo Padilla Luna - . DST diymmi80ared
This product is amazing!!!!! If I would have known earlier about this product I would have been using it since I bought my first car. Definitely, have recommended this to many of the racers and mechanics I know. Have had zero issues making and installing it and is solid as a rock!!! \n\n Furthermore, I had originally placed an order for the 80a, but it was back ordered . It would have taken 2-3 weeks to get it, but they offered me the High Performance upgrade at no charge since I had sent them a letter stating I needed it ASAP for registration and smog (california).
5 out of 5 - Best kit ever!!!
Noel Avila - . DST diymmi80ahpblack
I autocross a 12 Fiat 500 Sport. Lowered, with sticky tires, I needed to eliminate some movement in the drivetrain. The RF motor mount is very soft, and no one makes a stiffer mount or inserts for this that I could find. The poured urethane seemed like a solution. I purchased a used mount (so I could keep the original piece if necessary) - I removed the stem from the engine side, trimmed away some of the soft rubber ears, taped the back side of the mount and prepared the sand box for support. I also used a wood plug to block the hole where the engine side stem would need to be reinserted. I mixed the urethane per instructions and slowly poured it into all the voids, allowing them to fill completely. This mount used the majority of the can of 94A material. I allowed this to cure for a week then installed it into the car. A brief test run with some hard, sharp maneuvers indicated a much improved steering response and no flex from the engine/transaxle. Since this was done on the street, I am anxiously waiting for my first event to test it completely, but the indications are this is the fix I needed! Note - I used the race grade material so there is some vibration in the steering wheel & dash at idle, as expected. I did not really notice this much on the road, although there is a sense the steering wheel is more solid.\nFollow the instructions, be sure to allow it to cure completely, and I dont think youll be disappointed.\nA Great value compared to having a machine shop make me a solid aluminum mount for $700.00.
5 out of 5 - Great Stuff!
George M. Katona - . DST diymmi94ablack

Customer Questions and Answers

How much will kit diymmi make?
Part Number diymmi will make 400 ml, or 1 2/3 cups of liquid urethane.fo

Do you ship to the Philippines?
Yes. We ship internationally .

Can the part number DIYMMI be used on the 4 new mounts,(Front and Rear, Driver and Passenger Side, Upper and Lower) and is there enough to treat all four mounts?
This kit produces about 13.52 fl oz (400 ml) of Liquid Urethane. On most vehicles, this will be enough to complete the project on ALL the mounts. This product has been proven to work well for creating motor mount inserts and lasting for the life of t the mount. ...see more

How long does it take for the prothane motor mount pre primer to dry before I pore the urethane
Once you've mixed the urethane and activator you're ready to pour it into the mount! Once the urethane is mixed you only have about 15-20 minutes where it's pour-able!

Will one kit do all three of the mounts? I have the 4.0 and need to do both motor mounts and the transmission mount.
This kit produces about 13.52 fl oz (400 mL) of Liquid Urethane. On most vehicles this will be enough to complete the project on ALL the mounts. This product has been proven to work well for creating motor mount inserts and lasting for the life of th he mount. ...see more

What is the complete curing time on diymmi before re-installation and driveable?
The curing time on Part Number diymmi is 7 days at room temperature.

Can I use the DIYMMI kit to make upper control arm bushings?
The DIYMMI product isn't typically used for developing control arm bushings, but there also isn't a indication that it's not possible. You would need a good mold and lathe to complete the project. A better option might be cutting down polyurethane tu ubing to fit your needs. The link to those are below: https://www.suspension.com/universal-diy-solid-polyurethane.asp ...see more

What is the volume of one can with hardener?
Part Number diymmi will make 400 ml, or 1 2/3 cups of liquid urethane.

Do you have material specs for shear and tensile for the 80a?
For 80A PFL 3850 Tear PC 395 and split tear is 72


Will the diymmi bond to steel?
Yes, our diymmi kits will bond to steel.

Is there any extra cleaning/degreasing that needs to be done if Im using the diy poly kit on a brand new mount?
As long as all the surface area is clean you will be good to go.