The 3.3 x 11.5' Sound Dampener, Audio Isolation Noise-Reducing Material Roll from Pyle Audio is an engineered polyethylene, rubber material that is used to stop the transmission of sound in a wall, floor, or ceiling. It acts as a thin, dense sound barrier and is used as one component of a multi-layered construction scheme. The sound dampening membrane is built with a self-adhesive, double-stick tape backing and is flame-resistant. The roll totals 37.5 square feet and is suitable for vehicle, home, or office applications.