Siless Max 120 mil (3mm) 6 sqft Car Sound Deadening mat - Butyl Automotive Sound Deadener - Noise Insulation and Vibration Dampening Material (6 sqft)

This stuff is great, Really made a difference under the hood of our motorhome to keep engine noise down. Easy to apply and sticks like glue. Can be cut with scissors.

I don’t have a sound system, but I have an older car, a 2004 Corolla, and road noise is an issue. I installed this inside my door panels and trunk and the difference in sound is AMAZING. So many people get in and say my car “sounds good”, “doesn’t sound cheap”. It was easy to use and install with the roller (purchased separately). Worth every penny!

I have probably used around 30 plus boxes of this deadner in my build . It works great it's affordable compared to some of the other brands that are about the same why pay more when you can save money . There's several guys on my car audio team that uses it to.

Arrived quickly and happily surprised with the thickness and ease of cutting. I used this product to dampen the noise of a Bobcat Lawnmower with metal covers over the belt and pulleys. I am very impressed with this product.

I used this in the door panels, trunk lid and trunk floor. On a 2014 KIA Sportage. It was a night and day difference in the sound quality of the factory stereo. Doesn't have that tin can sound anymore. And the road noise is substantially quieter. Very easy to apply after cleaning the surface and using the rollers. Great product!