16 oz. RustAid bathroom spray gel is specially formulated to dissolve rust and iron stains on contact. There's no rubbing or scrubbing needed. Dual action formula begins to dissolve even the toughest rust and hard water stains on contact. No mess spray gel sticks to rust stain for maximum cleaning power. Cleans tile, stainless steel, chrome, porcelain, fiberglass, glass, concrete, brick, and more. Safe for indoor surfaces when used as directed. No harsh fumes. Biodegradable.