Review on 🔇 S'mart Mat - RED 150 Mil 20 Sqft Car Sound Deadener Material - Audio Noise Insulation Reduction & Foamed Small-Meshed Polyethylene Heat-Insulation with Strong Adhesion by William Lin

It's not as thick as you might think at 150 mils. That should be close to 4mm. More like 2mm. The foam itself is great, but the glue is extremely unforgiving. It's strong enough that if you manage to keep about 80% of it, it'll still hold up. But it is very difficult to work with him. What complicates id plastic carrier. It also attaches to anything with Static Cling, making an already complicated product even more difficult to use. If you look at my photos I put this on the inside of my doors above the Revain main muffler. It took a lot of patience and you can see in the photos that the material came into contact with the outside of the door and some peeled off. If you are patient and careful, use it. If not, stay away. This will upset you.