Super Iron Out is a superior solution to any rust stain. Cleans rust stains on toilet bowls, toilet tanks, white clothing, sinks, tubs, tile and showers, appliances washers and dishwashers, water softeners, concrete and exterior walls. Super Iron Out chemically changes rust and iron into a clear, soluble state that easily rinses away without scrubbing. It does not contain harsh or abrasive chemicals and is safe for white clothes, fiberglass, porcelain and acrylic finishes.