Need to tackle tough calcium and lime deposits as well as rust stains? CLR Calcium, Lime & Rust Remover is a powerful formula that quickly and easily dissolves and removes tough calcium and lime deposits as well as surface rust stains from bathtubs, toilet bowls, sinks, glass, chrome, fiberglass, stainless steel, kettles, humidifiers, dishwashers, washing machines and showerheads. The formula also is ideal for use on caravans and boats. CLR Calcium, Lime & Rust Remover is part of the EPA's Safer Choice Program recognising the product as a safer alternative to chemicals. The fast-acting, powerful CLR formula is septic-safe and contains no phosphates. Always spot test in an inconspicuous area before beginning to clean.