FatMat Sound Deadener is made to absorb vibrations and noises that travel through it giving you a dramatic reduction in irritating noises. MegaMat stops nasty rattles, eliminates vibrations, and reduces road noise, engine noise and exhaust noise in your ride. Improve audio quality, enhance bass, combats vibrational distortion. Applying FatMat Sound Deadener to quiet vibrations in your car can result in as much a 3 dB gain in sound. Patented Butyl rubber compound with pressure sensitive adhesive backing and aluminum layer fused to top.