Gallon, Deck Brightener & Wash, Ready To Use, Gentle Cleaner To Wash Away Dirt From Previously Stained Surfaces, Removes Mold & Mildew Stains, Brightens Gray Weathered Wood To Create Refreshed Appearance, Works On Decks, Fences, Siding, Pressure Treated Lumber, Cedar, Redwood, Coverage 250 SQFT Per Gallon.