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Eastwood Thermo-Coustic Sound Deadener Material is rated 4.4237 out of 5 by 59.
Rated 1 out of 5 by from Not happy, melted?! I bought a box a few years ago and never installed it, a few months ago I bought a second box and was getting ready to cover the underdash, floorpan, and side panels in in, but when I opened the first box, I found that all the black had oozed out and filled the sides of the box. Now I am reluctant to install any of it. This had been sitting in my garage for a while. I did put a couple of sheet on the inside door skins a few years ago, I probably need to look in my doors and check to see how it looks. I also put a small amount of it under the dash to kill a rattle, now i just noticed there were two small black drips on my red carpet, after takling a close look at it, it appears to be this black sticky stuff, obviously it dripped down to my carpet. I have not trouble with all the other eastwood products in the past, so this casts a serious question of the quality.
Date published: 2014-09-15
Rated 5 out of 5 by from awsome price fantastic product shipping can use some help I recieved my order and the box was in perfect shape. I opened the box and was saddened to see you ship the product FOLDED in the box.this stretched the product right in the middle where you folded it. Why not cut the product to 15" x 18" and stack it 18 layers instead of 9 layers of (18" x 30" and folded)? You could ship it in the same box at the same shipping cost and the customer would be happy. Handling 18' x 30" pieces can be very tricky with also peeling the adhesive cover off too. Pieces 15" x 18" are much easier to handle and lay without air bubbles too. Thanks for a great product. Donald
Date published: 2011-04-17
Rated 5 out of 5 by from My shop PaintWorks Unlimted in NHdid the install and was impressed! Im doing a complete resto on my 1967 Buick GS and I was considering useing a sound deading product but not sure what brand to go with. I get the email about this Thermo-Coustic Sound Deadener Material, after review of the video I decided to purchase it.. PaintWorks Unlimted in Dover NH who only specializes in auto restoration the shop who was doing the work on my car did the install and to there credit of excellent fine work they are very particular on any products .. Sean the owner at the shop notified me that the product was excellent on its ease of install and malleability more than the big brand name out. Totally so impressed with the product he will start using this foil in his shop exclusively for now on..
Date published: 2012-08-14
Rated 5 out of 5 by from You gotta have it! I just finished doing a interior restoration on a 1965 Mustang coupe which I have owned for a year or so. When you drove this car in the summer before, you roasted from the exhaust heat from the trans tunnell and firewall! It is amazing how much difference this product makes. I covered the floors, kick panel areas, even behind the rear seat and sides. Not only is it much cooler, but you can carry on a conversation while driving! I would recomend this to anyone doing a restoration, or building a street rod. The Eastwood product is great quality and easy to cut and form.
Date published: 2011-05-23
Rated 5 out of 5 by from good product just got done installing this product on the mini tubs i installed on my mustang, easy to cut with a sharp utility knife, from the back side or the foil side. do yourself a favor and template as many pieces as you can, cut with utility blade on top of some plywood or cardboard and only peel off a portion of the paper while you get it in place. don't listen to some of the reviews that say it's hard to cut or it's too sticky, these people most likely rushed the job and tried to use the same blade to do the entire job. don't you want it to be very sticky, i do!!
Date published: 2011-08-22
Rated 5 out of 5 by from You NEED this stuff! I bought this a while back and finally started to install it after prepping the floor with Eastwood's rust stabilizer, which is also an awesome product! The sound deadener material is easy to cut with scissors and allows for a very clean install! I recently started my car with the new cats on it and the side with this stuff installed was much cooler than the side without. I could feel the difference which tells me the stuff works! I highly recommend this as it is less expensive than the name brand stuff and is just as good if not better in my opinion!
Date published: 2010-08-30
Rated 4 out of 5 by from Decent Product Just installed on the floorboards and firewall in my 71 Charger with headers. Sound wise a big difference. As far as heat reduction, so-so. The driver's side firewall by my gas pedal gets to 180º during summer driving with the headers a few inches away from the firewall. With the Eastwood product it was reduced to 140º. The video only shows 20 seconds of heat on the metal. In the real world your driving your car for a longer period and with the constant heat from the headers (if your car has them)you probably won't see the same results as the video.
Date published: 2010-11-02
Rated 1 out of 5 by from Totally un acceptable I have bought many products from Eastwood over several years. I must say this is the only product That has been completely unacceptable. I installed it on a transmission tunnel and even before driving the car the black rubber had run down the sides and pooled on the floor. In my case the garage is below grade and does not get above 70 degrees even in the summer. I used about for sheets and what is left in the box has also oozed out along the edges. After reading several other positive reviews it sounds like there may have been some bad batches
Date published: 2013-12-01

Before I replace my headliner, could I install Eastwood's Thermo-Coustic Sound Deadener Material on the inside of the roof?  If not, is there another Eastwood product that you would recommend to install on the inside of the roof?

Asked by: Fritz
ThermoCoustic is not recommended for overhead applications. A product that you could use is Boom Mat dampening material. http://www.eastwood.com/dei-thermal-acoustic-interior-kit-050500.html
Answered by: NickC
Date published: 2014-09-16

I would like to put this product behind the vertical portion of my rear seat. Can I paint over the sticky side with Eastwood's trunk paint? I can put it on after I paint my trunk, but painting it with trunk paint would look better I think.

Asked by: MarkP
Hello, This product cant be painted over on the sticky side.We also recommend that the product not be used on a vertical surface unless all seams are taped tightly with our http://www.eastwood.com/insulation-tape-2-x-30-ft.html
Answered by:
Date published: 2014-09-15

Eastwood Thermo-Coustic Sound Deadener Material

Item #12117 Brand: Eastwood

Sound deadener kit at about HALF the cost of competitive products!
Heavy Item - Special shipping charges may apply.


Banish road noise, floor pan vibration and exhaust heat from your classic machine! Our Thermo-Coustic Barrier creates the ultimate in acoustic and thermal protection for your muscle car, street rod, boat or RV. Easily install under carpets, inside doors, around speaker boxes, and enjoy your ride in any environment.
  • Butyl rubber membrane is ideal for sound deadening road and driveline noise
  • High-performance aluminum facing reduces engine and exhaust heat
  • Conforms easily to interior and door panels
  • Maximum service temp, 140F. Not to be applied to overhead areas such as roof, hood or trunk lid
  • Kit covers approximately 33.75 sq. ft.

About Eastwood Thermo-Coustic Sound Deadener Material

Eastwood’s Thermo-Coustic Insulation is perfect to highly reduce road noise and engine heat to make your ride more comfortable! The Thermo-Coustic Barrier conforms easily to interior and door panels, with a hi-tack adhesive that lets you install them securely. Each of the 9 sheets are crafted with a .060"-thick layer of sound-deadening butyl rubber material, bonded to a high-performance, heat-reducing aluminum facing, for an overall thickness of 0.063".

Along with a significant reduction in road noise and driveline vibration, these Thermo-Coustic Barrier sheets help keep heat from penetrating your vehicle’s interior. Tests showed performance equivalent to that of the more-expensive major brand, so why pay more? Compare the performance and price to Dynamat liners and see for yourself.

Kit includes 33.75 sq. ft. of material, enough to insulate the most critical portions of your car’s interior and door panels. For more complete coverage, order two kits (particularly if you've removed the factory sound-deadening material during restoration). Imported.


9 sheets per kit. Each sheet is 30" long, 18" wide, 0.063" thick.


(Q) How much area does a complete kit cover?
(A) One complete kit (9 sheets) covers approximately 33.75 sq. ft.Thermocoustic weighs 0.75 lbs/sq ft.


Always wear gloves when you're cutting this material.


1-year mfr's. warranty against defects.

Accessories & Consumables


Eastwood Thermo-coustic Sound Deadener, 5 Square-Feet Kit

Eastwood Carpet and General Purpose Adhesive

Hand Roller Applicator

Flexible Sealer and Sound Deadener

Insul-Tape, 30 Feet

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