170.3 Sound & Crack Isolation Mat

170.3 Sound & Crack Isolation Mat is a high performance acoustical underlayment system that muffles impact noises through ceramic tiles, stone and other hard surfacing materials. It also minimizes the transmission of cracks from the substrate to the tile installation up to 1/8" (3 mm), non-movement cracks. 170.3 Sound & Crack Isolation Mat is a 3 mm thick rubberized membrane comprised of 88.5% post-consumer recycled materials.