Siless Liner 157 mil (4 mm) 36 sqft Aluminum Foil Finish Car Sound Deadening & Heat Insulation Closed Cell Foam - PE Foam Sound Deadener

Extremely sticky and good heft. Once they go on they’re not coming off. 4 mil is accurate. Highway noise is much reduced in a tall Sprinter van. I still have a lot left over so I’d say it’s a good value and size.

Very Impressed! This is nice stuff!

I've only placed a few pieces so far. However this stuff is super sticky. You will not have to worry about it falling off, just clean surfaces prior to placing.

Very difficult to use. I tried to use this on the inside roof of a 71 Plymouth which has a lot of stiffeners and recessed supports. I've used a lot of the three in one Silas sells, and it is a little forgiving if you need to adjust the placement and haven't pressed it in place yet. This stuff does not!Once you lightly place it, it's stuck. When you pull it off, the foam layer stays behind and must be scraped off.Works great for simple surfaces. If you need to slide it under other structures like stiffeners, find something else.

Very good stuff really really helped 2001 f250 7.3 made it much much quieter then before! Very impressive! Ac works great now ice cold

Sticks really well. Thicker foam than I anticipated. Also reflects heat which is nice. Great product.

Used in my truck and reduced the noise of my big tires!

Works well