GenieMat RST is an acoustic underlayment for floors. It is made from 94% recycled rubber content and can be used directly under tile, vinyl plank/ tiles and wood flooring. In fact it can be used under any hard surface floor finish in concrete and wood frame construction.It is used when superior sound control is required in multi-family housing, high-rises, or commercial buildings and protects ceramic tile, porcelain, and stone from substrate cracks.GenieMat RST acoustic underlayment engineered for direct adhered floor coverings such as tile, stone, wood, and vinyl floor coverings.