Rockville Rockmat RM36 36 Sq Ft Butyl Rubber Sound Dampening/Deadening Car Kit Rockville rockmat RM36 36 sq. FT sound deadener bulk Kit 72 mil+roller+degreaser 100% butyl rubber material with an aluminum heat resistant coating! (no asphault in our sound dampening material!!!) Contains 9 sheets of sound damping material -each sheet is 18" inch x 32" inch (4 sq. Ft. Per sheet) Paintable Surface Multi purpose is ideal for multiple applications including rear decks, doors, floors, any Part of the trunk, roofs, quarter panels, hoods, etc.