FatMat Sound Deadener absorbs 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. Patented Butyl rubber compound with pressure sensitive adhesive backing and protective aluminum layer fused to top.