SEAL-ONCE Multi-Surface Cleaner deep cleans and prepares exterior wood and concrete surfaces before applying SEAL-ONCE waterproofer, sealer, and stain products. For use on exterior projects such as: decks, docks, patios, fences, siding, pavers, brick, shingles and shake roofs, outdoor furniture and more. The concentrate formula makes up to 4 gallons and covers up to 1,000 sq. ft. on wood and 1,200 sq. ft. on concrete/masonry. For use on hard and soft woods, pressurized lumber, Brazilian hardwoods, and withstands harsh environments near open water. Penetrates below the surface Eco-friendly Eliminates tannin, rust stains and mill glaze Removes dirt, mildew and algae Low Odor Easy soap & water cleanup Coverage depends on the age and porosity of the surface and the method used to apply For use on hard and soft woods, pressurized lumber, and Brazilian hardwoods Covers up to 1,000 sq ft on wood and 1,200 sq ft on concrete