Thompson's WaterSeal TH.021802-03 Wood Sealer, Clear, Liquid, 1 gal | Use on decks, fences, outdoor furniture and exterior wood. Prevents water damage. Helps maintain wood's natural color. Coating resists mildew and UV damage. Exceeds industry standard ASTM D-446. Covers about 200 to 400 sq-ft per gal. Can be applied by paint pad, brush, sprayer and roller.