EnvirOx Mineral Shock Concentrate, is the reduced toxicity alternative to harsh acid-based mineral cleaners. It's unique combination of organic salt and safe degreasing agents visually melts away hard water scale, soap scum, lime, rust, mold and mildew stains, and salts from beer, milk and urine. Mineral Shock is: Non-corrosive to skin; Non-fuming; Biodegradable; Is unregulated for shipping, handling and storage. Use it on ceramic tile, grout, stainless steel, aluminum, copper, brass, concrete, terrazzo, porcelain, brick, glass, and fiberglass.