TWP Wood Stain and Preservative · Dark Oak · 1-gallon TWP100 Series is a EPA registered wood and deck stain and preservative. Containing unique ingredients which protect wood from damage,TWP100 series has been a leader and respected product for over 25 years. • Penetrating and enhances natural wood tones in 6 different colors • Preserves wood from turning gray • Sheds water • Used for all types of exterior natural wood - Decking, Wood Houses, Wood Fencing, Hardwoods, etc • Not prone to Mildew and Mold