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ALLWIN

Car Heat Sound Deadening Insulation Mat, - 394 Mil 10.8 Sqft Automobile Sound Deadening & Heat Insulation Material for Auto Hood Engine Roof Door and Trunk,40 Inch x 40 Inch, Aluminum Foil Finish

  • Based on 736 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Aug 28
Order within 4 hours and 44 minutes
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Material Type: 394 Mil


Style: 40 x 40"(10.8sqft)


Features

  • Sound deadening material size: Nominal thickness 394 mils; Total coverage area of 10.8 sqft; Nominal sheet Size 40x40 inches. working Temperature Range: -40F ~ 300F
  • Heat Insulation and Vibration Deadener: Effectively blocks 98% of radiant heat transfer. Sound deadening mat is a very versatile insulation material with excellent thermal barrier properties that will block engine, exhaust, & summer heat, ensuring your vehicle stays cooler in the summer and warmer in the winter, making your ride more pleasant!
  • Automotive self-adhesive insulation is a waterproof lightweight thermal deadener with a highly compressible closed-cell foam formulation, it absolutely doesnt absorb moisture and has no odor
  • The sound dampening mat can be applied to external partitions, firewalls, hoods, engine compartments, engine compartments, trunks, wheel arches, body panels, load floors, and internal partitions under the seat floor.
  • The sound dampening material comes in handy size sheets which make it easier in terms of the cutting and installation process and its flexible which makes it easy to install with or without a roller.

Description

394 mil (10 mm) Car Sound Deadening & Heat Insulation Closed Cell Foam - PE Foam Sound DeadenerStrong sound insulation and absorption performance, heat insulation, Reducing energy consumption with the strong performance of heat insulationStrong self-viscous performance

Material: 394 Mil


Brand: ALLWIN


Item Thickness: 10 millimeters


Recommended Uses For Product: Automobile sound deadening, heat insulation, and vibration reduction for external partitions, firewalls, hoods, engine compartments, trunks, wheel arches, body panels, load floors, and internal partitions under the seat floor. See more


Product Dimensions: 40"L x 40"W


Brand Name: ALLWIN


Manufacturer: ALLWIN


Number of Items: 1


UPC: 616943705379


Unit Count: 1 Count


Included Components: Sound deadening mat


Item Type Name: Sound deadening mat


Model Number: AL4040


Manufacturer Part Number: AL4040


Item Thickness: 10 millimeters


Item Dimensions L x W: 40"L x 40"W


Coverage: 10.8 square foot


Material Type: 394 Mil


Recommended Uses For Product: Automobile sound deadening, heat insulation, and vibration reduction for external partitions, firewalls, hoods, engine compartments, trunks, wheel arches, body panels, load floors, and internal partitions under the seat floor.


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Aug 28

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Similar Products

Top Amazon Reviews

    • Sound deadening
Material Type: 394 Mil Style: 40 x 40"(10.8sqft)
Works on my E-450 doghouse, cuts the heat and noise considerably.
Reviewed in the United States on August 17, 2026 by Dr D
    • Works well.
Material Type: 394 Mil Style: 40 x 40"(10.8sqft)
Reduced heat going into my engine bay and my back trunk. Adhesive could be better, but the material is sufficient. One roll is enough for an engine and trunk of a honda civic. If you have a bigger vehicle, you'll need two. Cheap price and works. Good value and simple to install.
Reviewed in the United States on March 16, 2026 by Michael Ford
    • Stick it up to keep the noise down!
Material Type: 394 Mil Style: 40 x 40"(10.8sqft)
I needed to replace the failing fiberglass insulation that was original in my 1996 motorhome. The original insulation was providing some sound/heat protection inside of my generator cabinet but it was falling apart. After cleaning off the failing insulation and adhesive, this new insulation seemed to stick well to the interior cabinet walls. I could easily cut this insulation with my scissors but it does make the backing paper try to shred at the cut edges instead of peeling off in one motion. Just being careful I could ensure that all of the protection paper came off to allow full adhesion to the metal walls. It was fairly easy to attach and turn corners. NOTE: this item could probably be stretched to the advertised 40" x 40" but I wanted to install it in its relaxed size of 38" x 38". I had plenty to cover the inside of generator cabinet fully. It did reduce the noise some from my generator. I guess I could also install more of this insulation on the outer walls of the generator quieting down even more of the noise inside my motorhome. So far it is sticking well but if things change I will edit my review of this product. ... show more
Reviewed in the United States on May 9, 2025 by David B
    • Sticks well, except on plastic parts
Material Type: 394 Mil Style: 40 x 40"(10.8sqft)
It holds well on metal parts of the car, but not on plastic parts. I had to spray extra glue. The sound insulation works well, I hope it is fireproof indeed...
Reviewed in the United States on May 10, 2025 by Fuzzy
    • Excellent
Material Type: 394 Mil Style: 40 x 40"(10.8sqft)
Review Image by TaylorVersace
Review Image by TaylorVersace
A little tricky to install on a 1991 Nissan Figaro. Take your time installing it. Especially do your best measuring and laying it down with a plan. I could not tell the noise difference under 30mph. But beyond that it’s noticably a little quieter. My sound system with sub woofer sound a lot better…. No engine noise interference. Be careful when you lay it down and not too out too much pressure, else it can rip unexpectedly. Also clean the surface area where you are install this and make sure it’s grease/oil/dirt free. Worth every penny. I am going to buy this again and install it on my Ram 1500 truck. See my before and after pictures ... show more
Reviewed in the United States on June 16, 2026 by TaylorVersace
    • Good price
Material Type: 394 Mil Style: 40 x 40"(10.8sqft)
Acoustic properties are good. This product reduced cabin noise and provides adequate thermal protection of my hood.
Reviewed in the United States on July 11, 2026 by Ann
    • Not as shown, also very lightweight construction.
Material Type: 394 Mil Style: 40 x 40"(10.8sqft)
Much lighter construction than expected. I will be surprised if it stays together under my hood and on firewall. Adhesive is weak, had to add spray on adhesive. Also not 40" x 40" , smaller. Arrives folded up and that causes issues when installing. Picture shows it in a roll.
Reviewed in the United States on August 12, 2026 by obars
    • Honestly, it's a perfectly good mat. Plus, it's rated for high heat
Material Type: 394 Mil Style: 40 x 24"(6.5sqft)
Originally I tried to measure and get the perfect sized mat for my hood, but I ignored the fact that you can cut this with just normal scissors. It's not fiberglass. It's perfectly good quality. In ended up cutting it into squares anyway just to be a little easier to apply. I'm sure you could un-stick it if you needed, but it's not intended to be stuck and unstuck multiple times. This might not work with all cars, but I was able to put this under the factor hood deadener. I just had to poke holes for the clips and push to get them to click in. This wasn't an issue for me, but it shows the product being rolled. Mine actually came folded up. The creases aren't a big deal, but I suppose it might be a problem for some folks. Honestly, it's a perfectly good mat. Plus, it's rated for high heat so I don't have to worry about it melting like butyl. ... show more
Reviewed in the United States on March 2, 2026 by Kevin Webster

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