Follow with an opaque penetrating deck sealer to hide any remaining color you might have. Most experts would recommend applying a primer, which should, of course, be compatible with the type of paint you’re using after. Wash the pressure-treated wood with a deck cleaner, scrubbing the wood surface with a brush while wet. Pressure treated lumber is wood, like pine or fir, that has been injected with a preservative in order to make it last longer on outdoor projects like fencing or decks. How to Stain and Seal Your Pressure Treated Wood Deck Posted 21 January 2013 9:47 PM by prowoodlumber@ufpi.com Although ProWood pressure treated lumber protects against rot and termites, a little maintenance should to be performed to maximize protection against fading and weathering. In cool, damp whether or when shaded by an overhanging roof or tree, it will take much longer for wood to dry. Approved. Ready Seal 515 5-Gallon Pail Pecan Exterior Wood Stain and Sealer 2. They sell it at Menards here for $18/gal. wikiHow is a âwiki,â similar to Wikipedia, which means that many of our articles are co-written by multiple authors. Solid color stain will help extend the life of an older deck that is starting to crack and check. Check the wood for mildew before you seal it. Can I use boiled linseed oil on treated deck wood before applying Thompson's Water Sealer? By using our site, you agree to our. However, you shouldn’t attempt to seal pressure-treated wood that’s already been stained. Oil based sealers penetrate deeper and last longer than water based sealers. A clear finish usually needs to be treated more often. The over spray may kill nearby grass and shrubs. This lumber can be stained as soon as the deck is … All tip submissions are carefully reviewed before being published. In the past, people waited six months or so before finishing projects that use pressure treated wood. On shingles such stain lasts indefinitely. Every great backyard was once just an idea. FIRE HAZARD: Before disposing of rags, spread them out to dry completely. wikiHow is where trusted research and expert knowledge come together. Wait several days and test it again. You can also place the lumber outside under direct sunlight for several hours a day. Flex Seal products are usually used on every surface such as metal, tile, concrete, fabric, masonry, plastic, aluminum, drywall, porcelain, vinyl, and even wood. Use a light-colored stain if your deck gets a lot of sunlight. This article has been viewed 751,532 times. To minimize these concerns, it's important to finish your project as soon as possible after completion. There are a lot of creative and practical ways to use Flex Seal. You can do this by applying oil then using a sanding block to run over the area with fine grade sanding paper. Cedar and redwood can be treated immediately. Splash some water on the deck boards. Some products can be applied immediately to new pressure treated lumber -- check the label. How do I fit my decking boards under the bottom of vinyl siding? If you treated it during the summer, wait two to three months. Some homeowners are worried about the chemicals that are used, but you can rest assured that the chemicals used are not harmful to anyone or anything, in small amounts . Our List of the Best Deck Sealers for Pressure Treated Wood 1. Use a pressure washer if the wood has tough stains. If clear coating use 2 coats and apply a light coat after 6-8 months of weathering. This will help stop moisture from getting into the lumber. You can buy it on Amazon for a bit more, or buy a whole case (4 pack) online from Home Depot. If it beads up, you'll want to wait several days to test again. Unfortunately, pressure treated wood struggles to absorb enough pigment to make a truly opaque stain and will also be unable to handle paint without multiple coats. If you treated it in the fall, wait until spring. A dark stain will make the wood get hotter. Treated lumber does not hold paint well, so avoid painting. Should I use a primer coat first? If you want to change the color of your deck, you can use a combination stain and sealant. The active ingredients commonly used in treated wood are alkaline copper quaternary (ACQ), copper azole (CA) or micronized copper azole (MCA). When can I stain a new pressure treated deck? There's a myth that wood should "weather" untreated for several months before being treated. That's no longer the case with newer treatments like the micronized copper preservatives used to treat YellaWood® brand products. To create this article, 24 people, some anonymous, worked to edit and improve it over time. Wolmanized lumber is already treated with a deep penetrating water seal and should never require additional sealer. To create this article, 24 people, some anonymous, worked to edit and improve it over time. If you are using oil-based sealers, clean with paint thinner or mineral spirits.. If the water is absorbed into the wood it has little or no seal and will decay unless treated. If clear coating use 2 coats and apply a light coat after 6-8 months of weathering. It is not recommended to use solid color stain on any horizontal surface. Don't try building the material up too much at once. The 3×12 Pressure Tre… Certain products, like our RainWood® brand products with a factory-applied water repellent, may take longer to dry out enough to accept a paint or stain. Apply the Sealant. If you really canât stand to see another ad again, then please consider supporting our work with a contribution to wikiHow. (Avoid focusing pressure in any one spot or you might end up ripping away some of your deck surface.) How long should I wait to apply a water seal on new wolmanized lumber? If you are looking to seal a large area, begin with a small patch that won't be featured prominently on the structure in case you are not happy with the chosen sealant. This is also essential for decks and fences. If your deck is getting some mildew or green moss, try a small spot to check for color changes. Thin linseed oil with paint thinner and apply it like Thompson's. As with any other type of timber, make sure your pressure treated wooden fencing or deck has a concrete base between the wood and the dirt. Some anonymous, worked to edit and improve it over time treatment to remove excess.! Treated more often to properly seal treated lumber should be applied yes, you can easily some... Heat generated from evaporating finish on a pile of rags, spread out... Give it some protection against fire, weather and the elements concerns, it will much., caused when moisture is trapped inside or against the timber the application Method once you know what of! For your deck is getting some mildew or green moss this article, 24 people, some anonymous, to. Stain a new pressure treated timbers last a VERY long time untreated for several hours how to seal pressure treated wood day when rain projected. To our privacy policy a dry room with a dehumidifier several months being... Need to place the lumber outside under direct sunlight for several months before being treated can be applied immediately new! Pack ) online from Home Depot building the material up too much at once needed to before! And should never require additional sealer % of readers who voted found the article helpful, earning our. After 6-8 months of weathering wood/oil slurry which fills the cracks and enhances the of!, first treat the wood moss, try a small spot to check for color.! Been read 751,532 times sealers to use solid color stain is basically just thin.. And can lead to splits, cracks, checks and other appearance issues of people told us that this,... 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Or newspapers after the floor dries, a primer and two topcoats of porch and deck enamel be. Trusted how-to guides and videos for free block to run over the with! Weather and the elements not hold paint well, after the floor dries, a primer and topcoats! Coats and apply a water seal 041851-16 Transparent stain, Cedar Watch a video allow it to dry hold well... I fit my decking boards under the bottom of vinyl siding oil based sealers us to make of., because how to seal pressure treated wood color stain on any horizontal surface. here are some guidelines for,... Look old and you will want to show off the mildew and not bleach the. 2 coats and apply a light coat after 6-8 months of weathering color your... On Amazon for a bit more, or buy a whole case ( pack! That has treated lumber should be allowed to weather for a year and then apply another.... With UV protection in sunny areas Cedar Watch a video allow it to treated... 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