Texrite 33877 LHT Gray Tile Mortar 50 lbs - Texrite LHT is a standard grade, polymer modified, large and heavy tile mortar, pre-blended with powdered latex polymer. It is composed of portland cement, sand and special additives that give it a very smooth and creamy feel when used. It is used as a bond coat for large format tile and stone, for interior and exterior use, over concrete and cementitious substrates. It can be used for setting porcelain tile, ceramic tile, natural marble and stone for service in residential and commercial use.