Rockville Rockmat 50 Sq Ft Butyl Rubber Sound Deadener Car Kit + Dynamat Sample Rockville rockmat Rm50 50 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 a big Roll of 50 feet so you can cut as needed! Multi-purpose is ideal for multiple applications including rear decks, doors, floors, any Part of the trunk, trunk, roofs, quarter panels, hoods, etc. Paintable Surface