Car Builders Stage 1 Sound Deadener uses a self-adhesive butyl mat as a vibration (sound) absorption rubber and an aluminium top layer that will assist to disperse heat. It is easily applied with a Car Builders Application Roller found in our Car Builders Install Kits. Each sheet is 300mm wide and 500mm long and will mould and stick to sheet metal and other substrates. Use on large open sheet metal to reduce the pebble in the pond vibrations in your car.