Zep calcium, lime, and rust remover is designed to remove calcium, lime, and rust from a variety of surfaces which includes glass, metal, porcelain, fiberglass, chrome, cement, and stucco. Concentrated, fast-acting formula removes stains fast. 32 oz. No. ZUCAL32: Size: 32 Oz., Type: Liquid, Pkg Qty: 1, Package Type: Bottle