Thompson’s WaterSeal semi-transparent wood sealer provides long-lasting exterior wood protection. Semi-transparent opacity adds moderate color and shows medium wood grain.Durable protection from water and sun damageYear round protection in just one coatAdds moderate color and shows medium wood grainAssured 5 years on decks, 7 years on fences and sidingExceeds industry standard ASTM D4446 for waterproofing woodHelps prevent water damageLab tested for waterproofing woodProvides a mold and mildew-resistant finishLightly tinted sealer and sunblock protects wood and enhances the wood grain