FatMat Sound Deadening Waterproof Butyl Bonding Strip 60 Mil Thick x 3/8" Wide x 82 Ft (Single Roll) Seals and Bonds Adjoining Surfaces to Eliminate Vibrational Noise and Rattles in Your Car Very High Initial Tack as Well as Permanent Adhesion Self-Sealing and Self-Amalgamating, Waterproof & Heat Resistant Solvent Free Butyl Material Performs Well in Wide Range of Temperatures Small size and flexibility are perfect for tight fitting areas such as automotive doors and speakers.