A quick-setting, polymer-modified mortar, excellent for commercial use and cold temperature installations, as well as small residential jobs and repairs. Quick curing properties allow for grouting in as little as 2 hours and light traffic in 6 hours. Product composed of a proprietary blend of Portland cement, inorganic aggregates, copolymers and chemicals. Suitable tile types include vitreous, semi-vitreous or non-vitreous tile (ceramic, mosaic, quarry, cement body tile), impervious porcelain and glass tile, brick and stone veneer, cement-based precast terrazzo, natural stone tile. Suitable substrates include concrete, mortar beds, masonry, Portland cement plaster, WonderBoard, cement backerboards, liquid applied waterproofing membranes such as RedGard and Custom 9240, crack prevention sheet membranes such as Crack Buster Pro, exterior grade plywood (interior residential and light commercial dry areas), gypsum wallboard (interior dry areas), existing ceramic tile, fully bonded sheet vinyl flooring, plastic laminates, cutback adhesive. Exceeds ANSI (American National Standards Institute) A118.4 and A118.11 standards without the need for additives. Square foot coverage per 25 lb bag: 45-50 sq ft (square foot) with 1/4' x 1/4' x 1/4' square notch trowel, 20-25 sq ft with 1/2' x 1/2' x 1/2' square-notch trowel.