Boom Mat XL Damping Material 4mm;12-1/2 x 24;15 sheets;High performance adhesive maintains adhesion throughout temperature extremes;Eliminates low frequency noise problems;Non-hazardous material;Flexible can be applied to irregular surfaces;Easily trimmed to size with Boom Mat Blade Lock Knife;User friendly peal and stick installation;Multiple uses including automotive, commercial and industrial applications;Durable weatherproof construction is also corrosion resistant;Flamability rated;The industry standard in vibrational damping technology Design Engineering Inc Design Engineering Inc Boom Mat XL Damping Material - 50224 050224 Hardtop Sound Deadening Headliner