Thompson’s WaterSeal transparent wood sealer provides waterproofing protection for exterior wood. Transparent opacity adds subtle color and shows the most wood grain.Durable protection from water and sun damageYear round protection in just one coatAdds subtle color and shows the most wood grainAssured 4 years on decks, 5 years on fences and sidingExceeds industry standard ASTM D4446 for waterproofing woodHelps prevent water damageProvides a mold and mildew-resistant finishBarely tinted sealer and sunblock protects wood and highlights natural wood grain