Blasts calcium deposits from glassware decanters, tea and coffee pots. Dissolves lime scales from coffee makers, humidifiers, tubs, toilets and sinks. Zaps rust stains from stucco, brick, porcelain, chrome & metal. Enhanced patented formula. CLR is a powerful formula for dissolving tough calcium and lime deposits and surface rust stains from tubs, toilet bowls, sinks, glass, chrome, fiberglass and stainless steel.