Calcium Lime Remover (CLR) is a powerful formula that eliminates built-up mineral deposits, lime and eradicates rust stains. Fast-acting formula cleans easily without scrubbing. Phosphate-free formula. Perfect for use on tubs, shower heads, glassware, sinks, fiberglass, humidifiers, dishwashers and more. Application: Descaler/Cleaner; Applicable Material: Ceramics; Enamel; Fiberglass; Glass; Laminates; Metal; Plaster; Plastic; Vinyl; Chemical Compound: Lactic Acid, Gluconic Acid, Lauramine Oxide, and Dipropylene Glycol n-Butyl Ether; Dirt Types: Calcium; Lime; Mineral Scale; Soap Scum; Rust.