BAY WASH CAR WASH TUNNEL SCUM REMOVER by SOAPS 'N SUDZHave you been called to clean a car wash? Struggling to break through all the leftover soaps, foam wax and tire shine that's been left behind? We get it. It takes something special to get through all of that residue. Bay Wash concentrate will clean and brighten painted brick, tile, vinyl and masonry without damage when used as directed. Works well in cold and hot water. DIRECTION FOR USE: Do not run this product through pumping system or heating