Revolutionary, extreme-performance, flexible, anti-fractuire, slump-resistant, polymer-modifed thin-set mortar. For setting ceramic and porcelain tiles, mosaics, pavers, glass tiles, quarry tiles, and white, pastel, or translucent marble (white Pro HPX only). Use for interior, exterior, freeze/thaw, water-submerged, and other demanding installations such as pools, shopping malls, airports, etc. Can be installed over radiant floor heating systems. Mixes with water.