The proprietary formulation of house wash contains a unique additive which removes tough stains from mildew, mold, algae, fungus and moss and leaves the surface completely clean. In addition, special surfactants penetrate the surface to safely and easily dissolve the toughest stains from dirt, oil, grease, bird droppings, tree sap and acid rain. Even removes grey weathering on wood, chalking and oxidation.Fast acting – spray on, wash offConcentrated formulaContains no bleach or ammoniaCleans up to 92.9 sq-m