Quickly & Safely Cleans Your Shower Without Damaging Your Natural Stone Non-Abrasive Biodegradable Non-Acidic Environmentally Friendly Granite ~ Marble ~ Travertine ~ Limestone ~ Glass ~ Ceramic Tile Granite Gold products are designed by stone care professionals with more than 40 years of experience in the natural stone industry. Granite Gold Shower Cleaner is the safe alternative for stone and tile care. Use instead of household shower and bath cleaners which can damage natural stone. Regular use will help prevent mold, mildew, soap and hard water deposits from attachment to the surface. Contains no phosphates or ammonia. 800-475-STONE Developed by stone care professionals in the U.S.A.