No bleach or ammonia. Removes tough stains from dirt, mold, algae, mildew & more. A major breakthrough in house wash technology. The proprietary formulation contains Sporex, a unique additive which removes tough stains from mildew, mold, algae, fungus and moss. Leaves the surface completely clean. Special surfactants penetrate the surface to safely and easily dissolve the toughest stains from dirt, oil, grease, bird droppings, tree sap and acid rain. Removes gray weathering on wood, chalking & oxidation. Earth-friendly. Cleans up to 4,000 sq. ft.