This professional grade acidic no scrub solution makes cleaning easier by breaking up rust, soap scum and other tough buildup on contact. For use on: Acrylic, fiberglass, ceramic tiles and porcelain, laminate, and Corian.Pros rely on acid-based formulations to dissolve many common water-related bathroom stains. Shower, Tub & Tile Cleaner, 32oz, PK4 Not for use on: Marble, granite, terrazzo, natural stone.