Maxmat 100 Sq Ft X 80 MIL Thick Self-adhesive Sound Deadener with Installation Kit. SuperMax 100 SQ FT x 80 MILL Thick Self-Adhesive Sound Deadener With Installation Kit. two 18'' x 33.33 ft roll of 50 MILL Maxmat SuperMAX Sound Deadner that comes with, knife, application roller and installation instructions. This is a 100 SQ FT ROLL ( total) self adhesive Maxmat Sound Deadner. Application uses are Automotive, Marine, RV and Home sound deadening acoustic insulation. supermax Maxmat is very easy to cut and apply with it's very, very stickie backing. Maxmat also has a heat-resistant aluminum coating for installation places with high temperatures. SuperMAX Maxmat Sound Deadner is a great way to boost your bass, reduces distortion, dampen vibration in those unwanted places in your ride and is the 100% way to go for stereo competitions to get the best bass out of your system.