Use on exterior siding, roofs, gutters, RV's, boats, driveways and patios. Removes dirt, grease, oil, and mildew stains. Contains anti-corrosive agents to protect o-rings. No bleach or ammonia, safe for people, pets and plants. No scrubbing. Spray-on. Wash-off. Can be used on all types of house exteriors. One gallon cleans 2,000 sq. ft.