Zep ZUCAL128 Calcium/Lime/Rust Cleaner 1 gal Liquid Pungent Light Yellow

Calcium, lime and rust stain remover removes rust stains, limescale, hard water stains and calcium deposits. The product is intended for stucco, cement, porcelain, glass, fiberglass and brick, making it ideal for use on toilets, sinks, tubs, shower heads and glassware. Mix with water and apply to surfaces with a brush, sponge or cloth, then rinse with clean water.