Iron out rust stain remover chemically changes rust and iron into a clear, soluble state that rinses away without scrubbing. Contains no harsh or abrasive chemicals, plus it's safe for white clothes and fiberglass, porcelain or acrylic finishes. Cleans toilets, sinks, tubs, dishwashers and exterior surfaces. Cleans and maintains water softeners and whitens, brightens and removes rust stains from white clothing and fabrics.