€¢ Patented calcium; lime; and rust remover for cleaning multiple surfaces €¢ Powerful non-toxic formula - effective on hardest of lime and calcium buildup €¢ Great for cleaning bathtubs; toilet bowls; sinks; glass; chrome; fiberglass; stainless steel; most coffee makers; humidifiers; dishwashers; washing machines and shower heads €¢ Great to use on hard water stains €¢ Exceptional versatility; effectiveness; and economy in 1 product €¢ Safe for plumbing; safe for use on white grout; septic-safe; biodegradable €¢ Not harmful to nearby grass; shrubs; or vegetation €¢ Blasts deposits: calcium from glassware; tile; tea and coffee pots €¢ Dissolves scale: lime from shower heads; tubs; humidifiers; toilets; and sinks €¢ Zaps stains: rust from stucco; brick; porcelain; chrome; and certain metals>> An industrial strength cleaner that instantly dissolves hard water stains caused by calcium; lime and rust deposits. CLR instantly removes: CALCIUM deposits from glassware; teapots and coffeepots; etc.; LIME scales from coffeemakers; kettles; humidifiers; toilets; sinks; tubs; shower stalls; shower curtains; etc.; RUST stains from cement; stucco; porcelain; chrome; metal; etc. If your area suffers from hard water problems; then CLR Industrial Strength Household Cleaner is for you."