How to Seal and Stain Pressure Treated Wood Decking. Most decks are made from pressure treated pine. Thompson’s Water Seal Advanced Wood Protectors can be applied to damp lumber, so it’s possible to clean and waterproof your deck in one day. Pressure treated wood is a must for many outdoor projects, but it requires different handling than untreated woods. They should be coated as needed with an oil-based wood preservative (not paint or opaque stain) to seal in the chemical preservative. Generally, the water protection should be started soon after construction, although some new, premium grades of pressure-treated wood are sold with a built-in water sealer that lasts a couple of years (Wolmanized Extra is an example).
Once treated, pressure-treated wood is often guaranteed to withstand bugs and fungus for years. Seal, Thompson’s Wood Protector and Thompson’s Water Seal Exterior Stain — designed to treat and protect pressure-treated exterior woods. Just because you used pressure-treated lumber doesn’t mean your outdoor project has to stay green. Not only can you stain treated wood, staining is actually good for your new deck. Kiln-dried after treatment: Dry treated wood is ideal because you can confidently stain it right away with either oil- or water-based exterior stains. Most people say to wait six months when staining pressure treated wood. Since I am not a patient person, I found a stain where no waiting is required. BTW, it’s also hard to beat Thompson’s for water-sealing concrete too, which reminds me. I need that done for the outside entrance pad on the garage.
Although treated wood is protected against decay and termite attack, the application of a water-repellent sealer to all exposed wood surfaces is recommended upon completion of construction. This sealer will help control surface checking (splitting or cracking) and provide an attractive appearance. Allow treated wood to dry thoroughly before staining or painting. Test dryness by sprinkling the wood’s surface with water. If the water beads up, the wood is too wet and you must wait before applying a finish. If the water soaks into the wood, then it’s dry and ready for stain or paint. A pressure treated wood deck can withstand a lot of wear and tear and will look good for many years. When you use the pressure washer, you are going to want to put some detergent in the water that you are using to spray the deck with.
I am currently in the process of having a deck built with new pressure treated wood. (No rain during that period) If you put a drop of water on a deck and it soaks up quickly into the wood then you are okay to start staining. This gallon can of Thompson’s Water Seal will cover 200-300 square feet of pressure-treated decking. To paint pressure-treated wood successfully, there are steps you would not takeand considerations you would not makewith regular lumber. Yet another option is to allow the wood to weather and become gray, and then to coat it with a protective sealant. The top layer of wood fibers exposed to the sun’s ultraviolet light can be rapidly destroyed. These effects can be minimized by blocking sunlight and slowing the evaporation of the water from the wood. That is why you must seal treated lumber. My question is..since we used pressure treated wood for it. I’m assuming it’s pressure treated pine stockade? From personal experience, I am not a great fan of Thompson Water Seal. This stuff says that you don’t need to wait, even on pressure treated lumber (though I can’t find it anywhere). In my opinion, products like Thompson’s or any of the clear water seals are a complete waste of time and money.
Sealers & Finishes For Pressure-treated Lumber
Weather wreaks havoc on unprotected wood, even pressure-treated pine, tropical hardwoods, cedar, redwood, and others that are resistant to rot and insect damage. A clear sealer will slow down or in some cases prevent water migration into the grain. For exposed places that naturally get very wet or that touch the soil, pressure-treated wood is often used as an additional protection. It repels wood-boring insects, too. A coating on pressure-treated wood helps keep out moisture, but it also helps seal in the preservative. This is important on wood that people will be touching, such as decks, porches, and outdoor railings. Make sure the surface is completely dry before applying the paint or sealer. Sprinkle water on the wood; it it beads up, wait.