About Phosphoric Acid Cleaner
Cleaning for cast surfaces including pre-cast concrete, non-polished natural surfaces including flamed and honed granite, tumbled and honed marble, cleft and honed slate, quarry tile, flamed and honed limestone, unglazed ceramic tile, porcelain tile, cement grout, brick, concrete, mortar and masonry. Removes cementitious grout residue and dirt build up.