... proof, sound absorbing, sound proof insulation for cas, Foil sound proofing, sound deandening pad/car Sound Deadening/sound insulation ... is more than twenty years.Water-proof, sound absorbing, heat protection and fire retardant. ... the mat to the desired size and shape before removing the release liner. sound proof insulation for cas, Foil sound proofing, sound deandening pad/car Sound Deadening/sound ...