UV-Resistant, Deep Penetrating, Oil-Based Preservative Finish Designed For Wood Siding, Shakes, Shingles, Fence, Roofs, And Decks. Soap And Water Cleanup. Guaranteed To Repel Water And Protects Against Decay For 4 Years On Vertical And 2 Years On Horizontal Surfaces. EPA Registered Preservative. Water Repellent Exceeds Federal Specification TT-W-572B, 3.7.Covers Approximately 150-300 Sq. Ft. Per Gallon. Coverage Depends On Type Of Wood.