EAST FOREST 276mil 15.7''x9.8'' Aluminum Foil Heat Shield Mat 21.53 sqft Sound Deadener Mat Noise & Heat Insulation Moistureproof Waterproof for Car Hood Ceiling Door, Sound Deadener for Cars Black

I used it to insulate the floor of a project car that I installed new floor pans in . This insulation seems like a decent quality for the price and is light weight and very easy to cut and install with basic scissors. It's not too thick or bulky and that's what I was looking for this job and it was cost effective.

Blocking heat and easy to work with

They are amazing. Very very sticky so be careful how you place them . I used them for insolation on the underside of my RV slide out. They still there and winter is over.

Works and looks good. Easy to use

Easy to apply, molds flawlessly to interior van walks and excellent sounding quality

Nice good insulation a little on thin side but works well

Muy bueno para aislar el calor y ruidos en el auto.

These are absolutely not 0.276", the thickest is less than 0.200" after 25 days laying flat and spread out in a warm room, the stack of 20 up on its edge averages out to just over 0.158" each, and they're not cut well or square. That being said, they're self adhesive (easier to install when they're room temp or a bit warmer), and I'm using them for quieting a generator enclosure, which isn't exactly what it says on the tin. Will update once I'm finished.