Guaranteed against water damage, peeling, blistering and graying of the surface due to UV light exposure. Guaranteed for 5 years on siding and 3 years on decks. Protects against sun and water damage. Penetrates deep into wood for long lasting protection. Restores natural beauty to weathered wood. Contains Flood Penetrol for superior penetration. For decks, siding, roofs, fences, outdoor furniture and more. Mildew-resistant finish. Easy soap and water cleanup.