Economical, polymer modified, thin-set mortar for floor, wall, and countertop tile installations. Use to bond vitreous, semi-vitreous, or absorptive tile: Ceramic, mosaic, quarry, cement, porcelain, brick and mini-brick, precast terrazzo, and natural stone to concrete, mortar beds, masonry, Portland cement plaster, wonderboard, cement backerboards, gypsum wallboard (dry areas), and existing ceramic tile. Meets ANSI (A118.11) with Thin-Set Mortar Admix; meets ANSI A118.4 without Thin-Set Mortar Admix. Do not bond directly to hardwood, luan plywood, particle board, parquet, cushion, or sponge-back vinyl flooring, metal fiberglass, plastick, and OSB panels. Approximate coverage: 80 - 90 sq. ft. per 50 lb. applied with a 1/4" x 1/4" x 1/4" square-notch trowel. Pot life: 2 hours. Allow to cure 24 hours before grouting or light traffic, depending on temperature and humidity. 50 lb. bag.