SKILCRAFT® - NSN5606131 Calcium Lime Remover (CLR) is a powerful formula that eliminates built-up mineral deposits and eradicates rust stains. It is perfect for use on tubs, shower heads, glassware, sinks, fiberglass, humidifiers, dishwashers and more. USDA Biopreferred Program Certified remover comes in a convenient bucket with a wire handle.