Minwax 33255000 Helmsman Spar Urethane Aerosol, 11.5 ounce, Satin Contains UV blockers to reduce the sun's graying and fading effects Forms a protective barrier against rain and moisture Special oils allow the finish to expand and contract with the wood as seasons and temperatures change Spar urethane Fortified alkyd resin formulated to dry to a hard but not brittle finish Perfect for patio furniture, exterior doors, bar tops, window sills, wooden boats Resistant to chipping, checking and cracking Use indoors or outdoors Contains UV blockers to reduce the sun&#039;s graying and fading effects. Forms a protective barrier against rain and moisture. Special oils allow the finish to expand and contract with the wood as seasons and temperatures change. Ideal for use on doors, windows, trim, bathroom cabinets, bar tops, kitchen countertops, outdoor furniture.