Polymer-modified for strength just add water. Adheres to most surfaces and types of tile. Bonds well to vitreous semi-vitreous or absorptive tile: ceramic quarry cement; impervious porcelain tile glass mosaics brick and mini-brick precast terrazzoand natural stone tile. Fast setting even in cold weather. Exceeds ANSI: A118.4 and A118.11. Covers 80 - 90 sq. ft. per 50 lbs. when applied with a 1/4 x 1/4 x 1/4 square-notch trowel.null