Thompson’s WaterSeal semi-transparent wood sealer provides long-lasting exterior wood protection. Semi-transparent opacity adds moderate color and shows medium woodgrain.Exceeds industry standard for ASTM D4446 for waterproofing woodLightly tinted sealer and sunblock protects wood and enhances the woodgrainHelps prevent water damageProvides a mold and mildew-resistant finishDurable protection from water and sun damage