Remove dirt, grease, oil, and mildew stains on most exterior surfaces. Works great on gutters, brick, metal, vinyl, or wood siding. Contains anti-corrosive agents to protect O-rings in pressure washer. No bleach or ammonia formula makes it safe for people, pets, and plants. Quick and easy preparation before painting. Requires no scrubbing; just spray on and wash off. 1 gallon cleans approximately 2000 sq. ft. Size: Gallon.