Our best deep penetrating oil, seals porous surfaces and blocks any water-activated stains. Penetrates and seals. Use under oil or latex. A must firstcoat for bare wood or hardboard siding. Covers up to 400 sq. ft. per gallon on smooth surfaces. Dries to touch in 4 hours under normal temperature and humidity. Allow 24 hours before topcoating. Product uses: Exterior bare wood, hardboard siding, trim, weathered surfaces, or treated lumber.