Vibro Solution's 6mm sound insulator is currently our number #1 selling car sound deadening material. The floor mat is designed primarily to prevent rattling of plastic parts and trim, but can also be used behind speakers or inside a bass enclosures as a soundproof or to block noise from outside. The unique pressure sensitive properties make it great for sandwiching between panels and also a second layer on floor boards and head liners. Works excellent on wheel arcs on door boards for door sound proofing, interior plastics, speaker boxes, and even as garage door insulation. This insulation foam board was also designed with a fiber mesh backing to keep its shape along with a self-adhesive water based/water resistant pressure sensitive glue on backing. If you are looking for serious high-end sound sound absorbing foam foams for your Vehicle then this is the place. In fact we are the ONLY company in the car audio and soundproofing material industry that manufactures high-end studio quality foams for vehicles.