Boyin Super-Sandwich Ton deadener

Boyin super sandwich sound deadener Boyin Super Sand wich 's material is four -part composite consisting og1/8 inch layer of neoprene,15mils of acoustic leasbarrier,1/4inch layer of high efficiency acoustic foam and 3 milute topfacing .with four unique acoutstic structures,it can attenuate the low frequency greatly and islolate the vibration from the road the engine these materials are alsp referred to as sound absoption mat as well as a coustic materials