CLR Multi Purpose Cleaner, Industrial strength, cleans away calcium & lime deposits & scales from porcelain, chrome, glassware & grout. Design for the Environment (DfE) Certified. CLR Blasts calcium deposits from glassware, tile, tea and coffee pots Dissolves lime scale from coffeepots, humidifiers, tubs, toilets and sinks Zaps rust stains from stucco, brick, porcelain, chrome and metal