Eliminates 100% soap scum. Powerful foam reduces scrubbing. Quickly cuts through soap scum & hard water stains. Pro Quality: Trusted since 1937. Love the feeling of a clean home, but hate the time it takes to deep clean? Call in the pros! With over 80 years of experience researching, testing, and manufacturing products trusted by professionals, Zep has what you need to clean safely and efficiently. Our new Home Proline of cleaners are specially formulated so that you can enjoy a professional deep clean without the extra work. Relax, we're here to help. For use on: Acrylic, fiberglass, ceramic, tiles and porcelain, laminate, glass shower walls/doors, and Corian (Corian is a registered trademark of E.I. du Port de Nemours and Co. This is an acidic formula - Acids and bleach should never be mixed, or production of hazardous gases may result). Not for use on: Marble, granite, terrazzo, natural stone. Glass shower doors. Shower heads. Bathtubs. No phosphates.