CLR PRO Calcium, Lime and Rust Remover delivers a fast, effective way to remove calcium, lime and rust deposits. It safely and effectively removes calcium, lime, hard water deposits, soap scum, discoloration and dirt. The versatile formula is perfect for use on plastic, ceramic tile, glass, stainless steel, faucet/shower fixtures, shower doors, fiberglass, toilet bowls and sinks. As one of the top lime and rust removers, this multi-purpose buildup remover is part of the EPA's Safer Choice Program recognizing the product as a safer alternative to traditional chemicals. Formula contains no bleach, ammonia or phosphorus. It is NSF-registered and approved for use in food processing, food storage and foodservice facilities.