Tough enough to strip latex and oil semi-transparent and solid color stains from vertical and horizontal surfaces including decks, railing, siding, and fences. Thickened formula clings to vertical surfaces. Does not contain bleach. Normally works in 5 to 45 minutes. When finish begins to lift from the wood, scrub with a stiff bristle brush. Rinse with large amounts of tap water using a garden hose or a pressure washer. Rinse thoroughly. Wet plants and shrubs and protect glass. 1 gallon will strip approximately 50 to 150 sq. ft. Clean up tools with water. Gallon.