Review on 🔥 High-quality 315mil/8mm 16.36sqft Auto Heat Insulation Pad Underlay Foam with Self-adhesive | Effective Sound Deadening and Automotive Dampening Mat | 60"x 40 by Ryan Reiter

Used this with a butyl muffler in my Tacoma. I like that it's one big sheet, I cut it in half and there's enough for two doors with a little bleed. As mentioned before, make sure you measure or estimate coverage by eye. Once filed, it's there forever. If you try to remove it, the foam will come loose and the adhesive will be left with the foam stuck to it. It compresses well. I put it in and then put on a new 6x9 with adapter rings (cut out a hole for the speaker to fit). It shrunk perfectly, allowing me to mount the new speakers on the door leaving just enough room for the panel to snap back into place.