Thompson water seal before or after paint. Applying a sealer andor stain typically is recommended every one to three years depending on the finishing product deck use weather conditions and sun exposure. This product not only helps bring back some color to my front porches but it helps keep a layer of protection between my wood porches and the falling rain and beaming sun. Painting over thompsons water seal quickstep posted in general discussion on june 15 2004 0836am when my porch was built it was going to be exposed a while before painting so the builder put a coat of thompsons water seal on it to protect it. Thompsons waterseal includes a complete line of deck sealers and stains for protecting deck wood from moisture and sunlight.
After researching it a bit i fully trusted that thompsons water seal waterproof stain will do what it claims to do. Thompsons waterseal offers waterproofing products to care for your wood deck and other exterior surfaces. Our waterproofing and wood stain products will protect all your outdoor surfaces. Refer to the specific drying times of your brand of water sealant.
It does not have uvmidlew inhibitors in it so its not appropriate for areas where moldmildew forms and if you dont want your wood to go gray.