Minwax Helmsman Spar Urethane is a specially formulated protective wood finish for interior and exterior projects that are exposed to sunlight, water, or temperature changes. It’s a wood varnish that contains UV blockers to reduce the sun’s graying and fading effects. It forms a protective layer against rain and moisture to shield your projects and keep them looking their best year-round. The special oils allow the finish to expand and contract with the wood as seasons and temperatures change. This spar urethane protects the natural beauty of the wood while providing a warm finish. It’s ideal for a variety of projects that include doors, windows, trim, bathroom cabinets, bar tops, kitchen countertops, outdoor furniture and more (not recommended for floors). Minwax is America’s leading brand of wood finishing and wood care products. Since 1904, we have been inspiring consumers to Keep on Finishing. We offer consumers a complete line of products to meet every wood finishing project.