This super concentrated multi-task formula makes 11 gallon. Cleans, degreases and restores: Vinyl and aluminum siding, gutters, roofing, concrete driveways, brick, stucco, masonry and wood. Contains Sprorex which removes mold, mildew, and algai stains from wood, decks, fences to include composite decks. No scrubbing needed, just spray on and then wash off. Special additives act to protect O-rings to protect pressure washers. No bleach or ammonia, Earth Friendly Formulation is safe for people, pets, and plants. Water-based, nontoxic, and biodegradable. Gallon size.