TWP Wood Stain and Preservative · Redwood · 1-gallon A unique combination of chemicals in a professional-strength, easy-to-apply formula that protects and preserves all exterior woods in 5 ways prevents water absorption, stops UV damage, helps prevent wood rot, resists mold and mildew, easy to apply and maintain. Dry time is 4-24 hours depending on weather conditions. Excellent longevity on both vertical and horizontal surfaces. Will not peel. Semi-transparent stain preserves natural wood color, repels water and aids in color retention.