ZEP House and Siding Pressure Wash is a concentrated formula specially designed for use in pressure wash machines with downstream injectors. Formula aggressively removes dirt and stains caused by algae, mold, mildew and other sources of soils. Concentrate can be used as a pressure washer cleaner on vinyl, wood, aluminum, fiber cement Hardie plank, hard coat stucco and brick.ZEP house and siding pressure wash cleaner is a concentrated formula dilution requiredFor use on vinyl, wood, aluminum, fiber cement Hardie Plank, hard coat stucco and brickNot for use on deteriorated surfaces like old wood and paint unless refinishing surface is intendedRemoves dirt, algae, mold, mildew and greaseUse formula with pressure washing equipment for best resultsPressure washers without downstream injectors capabilities may require manual applicationDo not mix bleach or any other chemicalsHouse and siding pressure wash cleaner makes up to 20 Gal./5000 sq. ft. of cleaner