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X-MAT® Sound Deadening 18x31 inches 34.8 sq ft is rated 3.6 out of 5 by 9.
Rated 1 out of 5 by from Not the good as Eastwood product it replaced I have used Eastwood Thermocoustic Barrier for years because it was identical to Dynamat Extreme but half the cost. This new XMat replaced the Thermocoustic Barrier product, but is very inferior. It is thinner and has far less adhesive qualities. I just pulled some up that was installed 3 months ago. Was barely stuck. Old product would have never come off. Price hasn't changed but quality has dropped. Both my hot rod shops will return to Dynamat and just pay the higher price. You do get what you pay for.
Date published: 2016-11-03
Rated 5 out of 5 by from Great Product!! I bought one box and its A LOT thicker then other products I've used, easy to install, did the interior of my 1953 Chevy in a couple of hours, if you want to do the doors and trunk you'll need (2) boxes. it REALLY makes a difference, lowers road noise and keeps the interior cool.
Date published: 2016-01-22
Rated 4 out of 5 by from Used on 1933 Chevy Eagle coup. I had issues with the way it was packed in the box it came in, it was folded into 3 parts. the creases do not come out, thus making the installation with ridges. Other than that it installed easy, and I will wait for the road test when summer comes, to see the difference it makes!
Date published: 2016-02-02
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This is going to sound silly, but I have a very loud generator for my RV. Will this product help cut the sound if I enclose the generator with it? With exhaust of course.

Asked by: Ritz
I've used this type of noise barrier for the same exact purpose. It will reduce the noise (not completely eliminate) if you have an unlined generator box. Just take the time to use a good quality product and roller to ensure good adhesion to the top sides and floor.
Answered by: chrisb009
Date published: 2017-06-25

Can X mat be used on the roof of a work van? Will it become loose and fall over time?

Asked by: Chester 1
For under roof and hood we recommend using our Underhood/headliner version. http://www.eastwood.com/x-mat-underhood-and-headliner-51x39x1-4.html
Answered by: S Church
Date published: 2017-07-22

How can x-mat be removed if necessary?

Asked by: Jackcvx
if it true butyl, it shoul dnot be easy to remove, 'chuch says yes" than I question th estaying power of product, as others stated this product is inferior
Answered by: mrbillp
Date published: 2017-06-15

Is this water proof or water resistant? Looking to use it on a UTV, will see some moisture.

Asked by: BOB_UTV
This product is not designed to be used in areas where moisture builds up. Try our Heat and sound barrier product.
Answered by: S Church
Date published: 2017-06-01

Can this be applied in 2 layers on firewall, floors and headliners?

Asked by: Dave H
This product is not designed to be applied in two layers or on firewalls or under headliners.
Answered by: S Church
Date published: 2017-05-21

Will it stick to wood?

Asked by: Bgregg24
As long as the wood is properly prepped and cleaned you should have no problem sticking the X-mat to it.
Answered by: S Church
Date published: 2017-05-21

is cleaning the surface being applied to required before install

Asked by: C Parker
You will want to thoroughly clean the surface with our PRE to ensure the best adhesion of this product.
Answered by: S Church
Date published: 2017-05-21

Does this product (15841) have an adhesive backing?

Asked by: Sprat
This product will have an adhesive backing.
Answered by: S Church
Date published: 2017-04-26
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X-MAT® Sound Deadening 18x31 inches 34.8 sq ft

Item #15841

Eliminate road noise and heat by applying under carpet, door panels, inner firewall and more.

In stock

Only $119.99

Sale $89.97



Eliminate road noise, floor pan vibration and exhaust heat from your vehicle! XMat creates the ultimate in acoustic and thermal protection for your muscle car, street rod, boat or RV.

  • All-purpose X-Mat with three layers offering excellent temperature and sound reduction
  • Butyl rubber membrane absorbs road and driveline noise while high performance aluminum facing reduces engine and exhaust heat
  • Easily cut and installed under carpets, inside doors, around speaker boxes and firewalls so you can enjoy your ride in greater comfort
  • Conforms effortlessly to complex interior contours of floors, door and side panels
  • Withstands up to 350 °F, reduces heat as much as 30 °F and sound by as much as 19dB
  • Covers 34.8 square feet, 9 sheets
  • Weight per sq ft is 12.8oz

More info...


Nine 18In. x 31In. sheets, approximately 34.8 square feet


Mat Size: 18" x 31" x 1/16"
Coverage (sq.ft.): 34.8
Temp Reduction Up To: 30ºF (23%)
dB Reduction Up To: 19 (22%)
Best Applications: Under Carpet, Door Panels, Trunk, Stereo Enclosures, Under Dash, Inner Firewall

Features and Benefits

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Wear gloves when cutting and applying this material

Click here to see safety products



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