Product Description Patented calcium, lime, and rust Remover for cleaning multiple surfaces including stainless steel, glass, fiberglass, ceramic, porcelain, chrome, cement, stucco, brick and morePowerful non-toxic formulation effective on hardest of lime and calcium buildupGreat for cleaning coffee pots, coffee makers, commercial washing machines, dishwashers, vinyl siding, sinks, toilets, humidifiers and filters, hard water stains; for use with pressure washersPatented calcium, lime, and rust remover for cleaning multiple surfaces including stainless steel, glass, fiberglass, ceramic, porcelain, chrome, cement, stucco, brick and moreExceptional versatility, effectiveness, and economy in one productSafe for plumbing; Safe for use on light-colored grout; Septic safe; Biodegradable; Not harmful to nearby grass, shrubs, or vegetation28 ozLight green liquid. Suggested Use Remove calcium deposits from coffee pot decanters, glassware and tea pots. Removes lime scales from coffee makers, humidifiers, sinks, toilets and tubs. Removes rust stains from cement, chrome, metal, porcelain and stucco.