-Soundproofing – Hushmat Silencer Megabond is designed to eliminate higher frequency airborne noise that damping materials do not treat. Engine noise penetrating through the firewall, road noise caused by tires and road surface variation that comes through the trunk and cargo space are a few of the problems that exist.  This noise is typically above 600Hz frequency (Hushmat absorbs between 600 – 4000 Hz).  Silencer Megabond also has excellent weatherability, including UV resistance and provides excellent thermal insulation.