10 Best sealer for pressure treated wood (2025)

• EPA-registered, insecticidal exterior wood preservative prevents attacks from termites and other wood boring insects while protecting against rot and decay
• Transparent, natural green color
• Designed to protect exterior untreated or pressure-treated wood in below ground, ground contact, fresh water contact, or above ground installations
• Ideal for docks and piers, fence posts, landscape timbers, other exterior wood exposed to moisture, weather, or wood destroying insects
• Highly recommended for pressure treated wood end cut protection

• New and improved
• The sealer of choice
• Protects against end grain checking
• Protect your wood investment
• Nearly 30 years of experience in making this product

• WATERPROOFING STAIN – Bring out the beauty of your outdoors with Thompson’s WaterSeal Clear Multi-Purpose Waterproof Stain. Proven to waterproof concrete, brick, exterior wood and other exterior surfaces.
• CLEAR STAIN – This outdoor wood stain and sealer provides a clear finish. It will hide the grain, but still allow the texture to show. It provides complete protection while adding enhancing the natural color.
• FADE RESISTANT FINISH – The advanced polymers in this outdoor wood and deck stain deliver fade-resistant color so it stays looking great year-round. The coating resists UV damage, so you can apply with confidence.
• EASY TO USE – Whether you’re refinishing an existing fence or putting the finishing touches on a new patio, this concrete, brick, wood sealer is easy to apply. Clean the surface thoroughly prior to use for best results.
• THOMPSON’S – Protecting & maintaining all your exterior surfaces, can easily be simplified if you know where to start. Thompson’s WaterSeal is here to take the edge off, thanks to our one-coat products, informative how-to guides & decades of expertise.

• MARINE SEALANT: Our liquid formula creates a UV-stable coating for protection against the elements, saltwater spray, and water damage. Marine is a great protector for outdoor furniture, thermally modified wood, and boat docks. Marine is safe for use over open water and is non-hazardous to aquatic life.
• DECK STAIN: It's water-based, ultra-low VOC, great for enhancing the extended life of your flooring, siding, and porch. The paint forms a water-resistant shield around wood fibers at the cellular level to help preserve the natural color.
• WATERPROOF WOOD SEALER: The wood used on boat docks, decks, and retaining walls near rivers, lakes, oceans, and ponds is subjected to constant moisture. We crafted a sealer, remove stain, and finish all in one, specifically for these installations.
• WOOD SEALANT: Our fast-drying protector penetrates wood below the surface, coating the wood fibers at the cellular level, which creates a long-lasting, flexible, breathable barrier. It provides a no-fuss, easy clean-up with soap and water.
• SEAL-ONCE: Our user-friendly wood sealers and stains are an effective way to protect your lumber or concrete against water damage. When you use Seal-Once, you have the satisfaction of knowing our products will not harm pets, plants, or people.

This Seal-Once Nano Penetrating Wood Sealer - Premium Waterproof Sealant - 1 Quart Clear Wood Sealant is a top choice in . Customers appreciate its quality, performance, and value.

• EPA-registered, insecticidal preservative prohibits termite damage, rot and decay
• Inhibits surface growth of fungal organisms: mold, mildew and staining fungi
• Paintable and stainable; imparts a transparent green color that naturally fades over time
• Designed for protection of deck or porch floor end cuts

• WATER-BASED POLYURETHANE WOOD FINISH: Our sealant provides top-notch protection against wear and tear in high traffic areas. It's odorless and ideal for use on wood siding, log homes, swing sets, outdoor furniture, wooden deck and fence, and more.
• WOOD SEALANT: Unlike many sealers that only form a topcoat, our protector penetrates below the surface to create a long-lasting, water-resistant shield around the wood.
• FLOOR SEALER APPLICATOR: Our premium clear is ultra-low VOC and great for enhancing the extended life of your exterior flooring. The sealant can be safely applied around your home, landscaping, vegetation, or over any water area.
• WATERPROOF SEALER: Ditch the oil-based sealers and choose a UV-stable coating option. Our fast-drying liquid creates a flexible, breathable barrier and provides a no-fuss, easy clean-up with soap and water, as it allows the wood to grey naturally.
• SEAL-ONCE: Our user-friendly wood sealers and stains are an effective way to protect your lumber or concrete against water damage. When you use Seal-Once, you have the satisfaction of knowing our products will not harm pets, plants, or people.

• Waterproofs wood & maintains natural appearance
• Protects wood from warping and improves dimensional stability
• Long lifetime (10+ years on softwood)
• Water-based, ready for use with brush or spray application
• Prevents rot and decay resulting from water ingress

• Wood stain formulated to bring out the natural beauty of pressure-treated wood
• Wood stain formulated in three natural wood tones
• One-coat formula
• Meets EPA guidelines to lock in carcinogens in CCA wood
• Great performance on ACQ wood

• WOOD SEALANT: Log and lumber wax end sealer is a premium wax emulsion end grain sealer for the prevention of end checks and drying splits in hardwood and softwood logs and lumber. By controlling the rate of moisture loss, up to 90% of end checks can be prevented.
• IMPROVES YIELD WITH LESS WASTE: End checking quickly degrades logs and results in a much-reduced yield of top-quality lumber. This sealer applied as soon as possible after logs are cut, virtually eliminates end checking. It is a wax emulsion that can be sprayed or brushed. It remains on the end grain after the log is cut into lumber, promoting even drying.
• EASY APPLICATION EXCEPTIONAL RESULTS: End grain sealer has proven to increase the structural integrity of hardwood decking. Designed to prevent end checking (drying splits) in freshly sawn logs, lumber, turning blanks, and other exposed wood end and face grain, creates a bond that extends the life of each deck board.
• WIDELY USED: This product can be used on logs, timbers, lumber, turning blanks, carvings, and other greenwood items. End Grain Sealer can also be used on wood that has been treated.
• I'M SURE YOU'LL LIKE IT: Treating a large amount of wood at different times of the year? Or different species? Try our end-grain sealer. Sealing the end grain of untreated green wood also prevents cracking and checking in this area, thus saving more wood by not having to cut the cracked area off.