S-800 is a specially formulated and balanced acrylic latex additive for use with Summitville S-777 thin set mortar. S-800 fortified mortars are sag resistant and have superior bond strength, increased flexural strength, excellent freeze-thaw resistance and improved workability. The use of S-800 eliminates the need for damp curing. S-800, when mixed with approved mortar, meets or exceeds ANSI A118.4 and A118.11. S-800 is non-toxic and non-flammable. S-800 mortar can be used to set ceramic tile over clean dry masonry, concrete, brick, fiberglass reinforced backer board, exterior grade plywood or gypsum board. S-800 mortar should be used in interior or exterior floor and wall installations where superior mortar physical properties are required.