Thompson's WaterSeal is a decent basic water repellent sealant for wood decks and outdoor furniture. It absorbs into the wood grain to resist moisture and contains some UV blockers. However, it needs reapplying every 6 months to 1 year. The water protection and UV resistance is not as robust as higher-end sealants like Behr. Thompson's is affordable and easy to apply, but it does not last as long or protect as well as premium options.