Boom Mat Moldable™ Barrier is a highly flexible .5lb/ft2 sound and moisture barrier designed for those applications where a budget conscious, simple noise control solution is needed. Conforms to the shape of your chassis, or for more intricate areas, can be molded with a heat gun. Even becomes quite flexible by simply warming the BM-MD outside on a sunny day. Easily installs with scissors and a heat gun and bonds itself where seaming is necessary. It's waterproof properties, along with its thin profile, make it perfect for a sound and moisture barrier behind door panels. Can also be used with a decoupler such as the Boom Mat Lite for increased acoustical efficiency, an important consideration especially in the firewall area, or to control exhaust noise in the cabin.