This proprietary blend of high power acids plus detergents makes quick work of scale rust, calcium deposits and other stains from vitreous surfaces. Take on even the toughest, hard-to-remove stains with this highly concentrated formula which easily dissolves scale and stains while leaving a pleasant fagrance. Features a blend of detergent, inorganic acid, wetting agent and rinse additive formulated to keep toilet bowls and urinals bright and clean. pH 2.0. Ready to use.