Powerful, trusted multi-use cleaner dissolves even the hardest calcium & lime buildup, rust, mineral deposits, hard water stains, soap scum, & oxidation. Certified EPA's Safer Choice for safer chemistry means that this formula is safe for use in a wide variety of applications including dishwashers, coffeepots, sinks, toilets, glass, siding, stucco, sprinkler systems & more! CLR PRO Calcium, Lime & Rust Remover is NSF Registered & is approved for use in food processing, food storage, & food service facilities. Plumbing & septic safe. Phosphate-, bleach-, ammonia- & alcohol-free. Application: Descaler / Cleaner; Applicable Material: Ceramics; Enamel; Fiberglass; Glass; Metal; Plaster; Plastic; Vinyl; Dirt Types: Calcium; Lime; Mineral Scale; Rust; Scent: Unscented.