View How Long Does Thompson's Water Seal Last Images. I have an almost full 5 gal. Now that you've applied thompson's water seal following the instructions above, to your entire surface, you can walk away and let it dry for 24 hours.
Thompson's® waterseal® offers waterproofing products to care for your wood deck and other exterior surfaces.
Apply water seal directly onto damp surfaces to provide long lasting waterproof protection within hours. Some one mentioned thompson's water seal, it is good stuff. If you seal it while it is sticky, it may never get fully dry and hard! If you do, wash with plenty of water.