Stop fighting engine rumble, speaker rattle, road noise and buzzing vehicle parts! Apply Dynamat Xtreme to your vehicle's resonant surfaces and enjoy improved clarity, loudness and bass response from your car stereo. High-performance Dynamat Xtreme is lighter than Dynamat Original, four times more effective, requires no heat to apply and is recommended for vehicle tops, sides and contoured areas. Dynamat Xtreme is coated with aluminum for high temperature areas such as firewalls and floors.