Siless Liner 157 (4 mm) mil 36 sqft Car Sound Deadening Closed Cell Foam & Heat Insulation mat - PE Foam Sound Deadener Material & Heat Barrier
Condition: New
Buy Now, Pay Later
As low as
$11
/ mo
Learn more
- – 4-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Thursday, Jun 4
Recently Viewed
Material Type: 157mil Closed Cell Foam
Style: 157 mil 36 SqFt
Features
- Closed Cell Foam: OIL and Waterproof LINER closed-cell polyethylene foam is the best for car, Siless with an adhesive layer 100% ensures optimum efficiency and thermal insulation that could be possibly gained. The price of 1 sqft of Siless Liner with similar characteristics is more then three times cheaper! Excellent quality for less money!!
- Heat Blocker and Vibration Deadener: Effectively blocks 98% of radiant heat transfer. Siless Liner is a very versatile insulation material with excellent thermal barrier properties that will block engine, exhaust, & summer heat, ensure your vehicle stays cooler in the summer and warmer in the winter, making your ride more pleasant!
- Lightweight, Waterproof: It is a waterproof light-weight thermal deadener with highly compressible closed cell foam formulation, it absolutely doesnt absorb moisture and has no odor, and its flexible which make it easy to install with or without roller.
- The operating temperature of the material is the same as of the rubber foam up to 215 degrees Fahrenheit.
- SILESS Liner specifications: Self-adhesive foam rolls (closed cell PE foam) with waterproof glue. Thickness 157 mil / 0.157 inches / 4mm. Number of rolls in the package - 1. Total coverage area - 36 ft2. Each roll size - 15.74 x 330.7 inches.
Material: 157mil Closed Cell Foam
Brand: Siless
Item Thickness: 4 Millimeters
Recommended Uses For Product: Insulating and soundproofing various components of a vehicle, including the firewall, doors, roof, trunk, and floor. See more
Product Dimensions: 330.7"L x 15.74"W
Brand Name: Siless
Manufacturer: Bema Group Inc.
UPC: 670875990586
Manufacturer Part Number: SLS15736
Model Number: SLL36
Unit Count: 1 Count
Item Weight: 2.6 Pounds
Item Thickness: 4 Millimeters
Item Dimensions L x W: 330.7"L x 15.74"W
Coverage: 36 square foot
Material Type: 157mil Closed Cell Foam
Recommended Uses For Product: Insulating and soundproofing various components of a vehicle, including the firewall, doors, roof, trunk, and floor.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Jun 4
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Material Type: 157mil Closed Cell Foam
Style: 157 mil 36 SqFt
I've been restoring a 1976 MG Midget barn find. I bought some Sinless liner to help make the car rattle less and feel more solid. This product is easy to cut, easy to install, and extremely sticky. I used it to line the trunk, the interior, and even some under the hood of the old MG. The adhesive stands up to the brutal temperature of the engine bay, and when (by accident) some fuel spilled onto the foam, it didn't fall apart or turn to mush. Thanks to Siless, the MG now feels like a modern car. The floor pans feel much more solid, the doors make a heftier thud when you close them, and the trunk no longer sounds like a percussion instrument when you touch it. If you know what you're doing, this product will transform the feel of a car. I found that 36 sq ft was enough for my MG Midget, but for a bigger car I would want more. The pattern on the back helped me to cut perfectly measured squares and rectangles. The foam itself doesn't have a strong odor, it works super well, and has held up to several months of changing temperatures (in the Midwest US.)
...
show more
Reviewed in the United States on November 11, 2025 by Dan K.
Material Type: 157mil Closed Cell Foam
Style: 157 mil 36 SqFt
Good stuff, easy to use, self adhesive backing contours around curves easily and works great.
Reviewed in the United States on April 29, 2026 by David Spencer
Material Type: 157mil Closed Cell Foam
Style: 157 mil 36 SqFt
Great adhesion, and you can immediately see the sound difference when you rap the area and compared it to another area without it. Also, very easy to cut and apply. Once on, you may not be able to peel it and reposition it, so be sure where you want it.
Reviewed in the United States on March 2, 2026 by Ligia
Material Type: 157mil Closed Cell Foam
Style: 157 mil 36 SqFt
It works OK, could be better. The heat insulation is subpar, it needs several layers to make an actual difference. It is very lightweight but it needs more heft in my opinion. It looks like regular foam once installed nothing fancy, a bit shiny. It does scuff fairly easy, so be careful with whatever roller you use. It doesnt have any weird smell like butyl does or anything like that, it is OK value for the money, I expected a bit heavier material but it does the trick, have some very slight vibration reduction but nothing noticeable until a few layers are put down. You can get quite a large roll so it does cover a lot of space. I did wish they offered a wider version.
...
show more
Reviewed in the United States on October 5, 2025 by Xavier
Material Type: 157mil Closed Cell Foam
Style: 157 mil 36 SqFt
If you purchasing Siless Liner 157 mil (4 mm) Sound Deadening mat, to block unwanted sounds in your car, this is what you need to buy. But wait! It's not the only thing you need to buy if you want to "actually" deaden sound. By itself, it will definitely block a noticeable amount of sound, and, most likely, that's all you realistically need. But... But... If you want the Siless Liner Sound Deadening Mat to really help you take it up a few notches, to get the best sound almost bordering on soundproofing, listen up. You will have to install traditional butyl rubber first. Doesn't have to be the Siless brand, but I'm sure they would love to sell both to you, I used both Killmat (80mil) and Noico (50mil). I have a Honda S2000. It's a two-seater convertible sports car if you don't know what this car is, and it's loud when I'm driving above 60mph. I also happen to have a sound system installed as well. Other than that, the car is stock. I first installed the butyl rubber on the car's interior sheet metal. I went all out and covered everything I could. I didn't need to but I wanted to. I was extremely impressed with the results. But I wanted to go further. Not because I needed to but because just wanted to see what it would be like. So I bought Siless Liner 157 mil (4 mm) 36sqft Sound Deadening mat to go on top of the butyl rubber mats. I put this over every area I installed the butyl rubber. I had to be careful of clearance issues since I added a significant amount of underlayment, and you should too. If you put butyl rubber sound-deadening materials in 50% of the total interior area, you'll hear a noticeable improvement. If you put butyl in about 80% of the total area, you'll be even more amazed at the improvement, compared to before. I originally did all the above myself, so that's my experience and so your mileage may vary. I then installed the Siless Liner Sound Deadening mat over every place I could even going further than I could with the butyl rubber. I used the Siles Liner in areas where butyl rubber would not have been effective, such as the roll bar hoop area and large empty cavities or holes. I covered everything I could, firewall, doors, floor pan, transmission tunnel, trunk, trunk lid, fuel tank area, rear quarter panels, and rear-wheel tunnels, in Siless Liner Sound Deadening Mat. WOW!! The Siless Liner Sound Deadening Mat was the icing on the cake! Let's not forget, this car is a convertible sports car so it will never be a quiet ride, ever. But I can now actually have a conversation with a passenger at a normal-ish volume! This also means I can now have a normal hands-free phone call without having to plug one ear to block out the noise! My sound system sounds so much better! Just by going through the install process, I looked for any vibration, rattle, squeak, and noise-prone areas to either eliminate or reduce unwanted noise production. If you forget this step, the inside and outside of your car will rattle and buzz. I skipped this step the first time around. But did it right before I installed more butyl rubber and the improvement was impressive, especially inside the car. Outside the car, I didn't notice a difference until I put the last layer of Siless Liner Sound Deadening Mat. The sound deadening mat works both ways from what I can tell. If I turned up my music, as loud as I occasionally do, parked in the attached garage to the house, with the garage door closed, I would be barely able to tell the car was playing music in the garage. It sounds like it is another car, just a little bit down the street, with a very loud base. If you stand 20 feet away outside the car, the sound system is noticeable, but not obnoxious by a long shot. Get a 3 piece wood/metal roller set as well, which makes quick work of large areas.
...
show more
Reviewed in the United States on December 23, 2021 by stookie778
Material Type: 157mil Closed Cell Foam
Style: 157 mil 36 SqFt
Works great but plan before you pee off the back, it sticks to itself fast
Reviewed in the United States on April 24, 2026 by Charlene sullivan
Material Type: 157mil Closed Cell Foam
Style: 157 mil 36 SqFt
Does exactly what it is supposed to do. The only concern I have is that the film on the back doesn’t remove easily. I am working a pretty specific job by myself and it’s frustrating having to stop what I’m doing continuously to remove the paper backing.
Reviewed in the United States on April 2, 2026 by Well That’s Swell
Material Type: 157mil Closed Cell Foam
Style: 157 mil 36 SqFt
Product worked as advertised. Sound dampening material was very adhesive, easy to install, and Improved sound quality in the vehicle.
Reviewed in the United States on March 13, 2026 by Tyler Stidham