Car Insulation - 4' x 10' Roll (40 Sqft) Sound Deadener & Heat Barrier Mat - Automotive Lightweight Thermal Insulation Car Insulation - Thermal Sound Deadener 40 Sqft - Lightweight Automotive Heat Barrier Controls Heat, Reduces Sound, & Minimizes Vibrations Thermal & Vapor Barrier - Blocks 97% Radiant Heat Crush Resistant - Polyethylene Closed Cell Reinforced Foam Core (Overall Nominal Thickness - 1/4") Extremely Light-weight & Flexible Material