3. Step 6: Drying Times. Thompson water seal dry time takes about 24 hours to dry thoroughly. If you choose to clean the deck with a power washer, do so carefully. Allow the sealer to penetrate deep into the tile and form a protective coating. Non-slip coatings are acrylic-based liquids that are applied to decks just like a paint or sealer. Working with the wood grain, apply an even coat of stain using a 4-inch brush. Apply sealer or stain to the deck railings, following the product directions; application methods vary slightly by product. Let the sealer sit for 5 minutes. A paint pad works well for the broad faces of railing and the balusters, while a paintbrush is best for corners and tight spots. Now allow the deck to thoroughly dry. You can also apply a sealer or stain with a garden sprayer. The best way to clean a deck is with a pressure washer. Sprinkle some water on the deck. Non-Slip Coatings. See out tips on Applying A Deck Stain in Full Sun. Some important tips. In general, a tip with an 8 inch spray pattern and a hole size of .013 will provide you with the best control. Then let it dry thoroughly. You want to avoid using a pressure-washer because it could damage the boards. Before applying stain, make sure your deck has been cleaned properly. Leave the tile undisturbed for at least 5 minutes so the sealer can fully set. Before applying a sealer, clean the deck thoroughly with a scrub brush and a cleaner made for decks. First, clean the deck appropriately, especially if it's been a few years since your last staining. Start at the upper corners of wall tile and work your way down to apply the sealer evenly. Apply the sealer parallel to the deck boards. Applying semi-transparent deck stain is an ideal way to add color to your patio as well as protect it. Power washers can easily damage the wood. Use the water test to check your deck every few months to ensure the sealer is still repelling water. Being aware of the various tips and hints that can be followed during the process of applying the stain will ensure that you achieve a decent result. If available, you may also use a roller to first apply the stain, then work it into the wood with your brush. If the droplets sink in, the wood is ready to be stained. Applying wood sealer to deck floor boards using a staining-pad. We recommend applying your deck stain in the morning or evening when possible so that the sun does not shine brightly on the deck while you are working. If you have a brand-new deck made of treated lumber (as opposed to cedar or redwood), wait at least a few weeks before sealing it for the first time. Also, make sure you don’t spill any water on it since the sealer is still vulnerable. How to Apply Deck Stain in the full sun of the day and the issues that could potentially arise. Instead, use your hose to spray any dirt off the deck. And how do I stain my deck for the first time? 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