Each Betsan Glass Pool Tile Mosaic is uniquely manufactured using our Silycord Mounting system. This system, along with our tile's other special features, increases the adhesion rate to 95% as well as the grout area to 100% for maximum installation life. Our tile is freeze/thaw resistant with near zero thermal expansion and we have the ASTM Test Results to prove it! Our sheets are sold in larger sizes than the typical 1 square foot per sheet providing a 30% faster installation time saving you money!