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The first step at reducing noise in a vehicle is to absorb structure borne vibration. Spectrum is a water based acrylic polymer that is loaded with noise and heat absorbing materials. Designed to be installed on exterior or interior sheet metal, Spectrum will provide a seamless and odorless constraint layer damper (CLD). Spectrum is up to 300% more effective than tar boards or asphalt sound deadeners at 50% less weight.