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 the most color and shows the least wood grainAssured four years on decks, five years on fences and sidingHelps prevent water damageBarely tinted sealer and sunblock protects wood and highlights natural wood grain