10 Best Deck Sealers of 2025

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  WATERPROOFING STAIN Bring out the beauty of your outdoors with Thompsons WaterSeal Clear Multi-Purpose Waterproof Stain. Proven to waterproof concrete, brick, exterior wood and other exterior surfaces.
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  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.
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  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.
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  EASY TO USE Whether youre 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.
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  THOMPSONS Protecting & maintaining all your exterior surfaces, can easily be simplified if you know where to start. Thompsons WaterSeal is here to take the edge off, thanks to our one-coat products, informative how-to guides & decades of expertise.

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  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.
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  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.
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  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.
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  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.
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  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.

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  WATERPROOF CLEAR DECK SEALER: An extremely durable clear finish that helps prevent the return of black stains on composite decks while protecting composite and natural wood surfaces from water damage and UV radiation
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  LONG-LASTING COMPOSITE DECK WATERPROOF SEALANT: This wood sealer defends composite and natural wood from moisture and UV damage, while zinc nano-particles help prevent fading, graying, and color loss to preserve your decks natural look
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  EASY APPLICATION & MAINTENANCE: Apply this transparent waterproof coating with a sprayer, brush, or pad applicator, clean-up easily with soap and water; recoat when graying initially starts to appear; 1 gallon covers 100150 sq. ft. for 2 coats
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  DRY TIME AND APPLICATION TEMPERATURE: Dries in 24 hrs above 45°F; wait 24 hrs before use; apply clear wood sealer only when temperatures are above 45°F; not for painted or varnished surfaces, best on bare composite or natural wood
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  MADE IN THE USA: Our deck sealer waterproof protection products are proudly made in the USA with quality ingredients and advanced water-repellent technology, delivering long-lasting defense for composite and natural wood in any outdoor setting

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  Includes Only 1 Gallon

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  ADVANCED PROTECTION FOR OUTDOOR WOOD: DEFY Extreme wood stains offer high-performance deck stain and sealer products that prevent graying & weathering while also extending the life of exterior wood surfaces
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  LONG-LASTING WOOD SEALANT: This clear wood sealer protects your wood from moisture damage while the zinc nano-particles block harmful UV rays to prevent sun damage; ensuring lasting preservation of the wood's natural beauty in all weather conditions
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  EASY APPLICATION & MAINTENANCE: Apply this transparent waterproof coating with a sprayer, brush, or roller; easily clean up spills or errors with mild soap & water; reapply when water absorption is visible; 1 gal covers approximately 100-150 sq. ft.
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  VERSATILE: Extreme Crystal Clear wood stain has multiple use applications, whether that be a fence stain, deck sealer, or a stain for wood furniture, our product is designed to protect against the elements wherever you need a waterproof wood sealer
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  MADE IN THE USA: DEFY Extreme is proudly made in the USA with high-quality ingredients; our goal is to provide a reliable exterior wood stain sealer that uses innovative technology with tested formulas for superior outdoor wood protection

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  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.
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  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. It helps protect against the elements.
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  FLOOR SEALER APPLICATOR: Our premium gloss 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.
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  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.
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  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.

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  NO LAPS, RUNS OR STREAKS: Goof Proof formula with no back brushing required; ideal for exterior wood projects
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  OUTSTANDING DURABILITY: No cracking, chipping, flaking or peeling with excellent moisture resistance and UV protection; great for outdoor decks, fences, wood siding and more
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  CAN WITHSTAND RAIN WITHIN MINUTES OF APPLICATION: Can also be applied in direct sunlight
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  HIGH AND LOW TEMPERATURE APPLICATION: Requires no wet-line application, the product will blend itself and can be applied in any temperature range for proper application
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  EASY TO APPLY AND MAINTAIN: Low odor formula may be applied using sprayer, roller or brush onto the wood's surface; no sanding or stripping required for reapplication

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  NO LAPS, RUNS OR STREAKS: Goof Proof formula with no back brushing required; ideal for exterior wood projects
• 
  OUTSTANDING DURABILITY: No cracking, chipping, flaking or peeling with excellent moisture resistance and UV protection; great for outdoor decks, fences, wood siding and more
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  CAN WITHSTAND RAIN WITHIN MINUTES OF APPLICATION: Can also be applied in direct sunlight
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  HIGH AND LOW TEMPERATURE APPLICATION: Requires no wet-line application, the product will blend itself and can be applied in any temperature range for proper application
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  EASY TO APPLY AND MAINTAIN: Low odor formula may be applied using sprayer, roller or brush onto the wood's surface; no sanding or stripping required for reapplication

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  Advanced Water Repellent Protection Designed for natural stone, concrete, and masonry surfaces, this penetrating, water-based sealer helps limit water absorption on structurally sound, crack-free areas.
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  Ideal for Pool Decks & Water Features Perfect for decks, patios, walkways, waterfalls, and porches near pools, helping maintain surface integrity while keeping its natural look.
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  Preserves Appearance & Reduces Stains Helps protect against salt deposits, rust stains, and efflorescence while allowing surfaces to retain their original color and texture.
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  Breathable & Non-Film Forming Unlike some sealers, this formula allows moisture to evaporate while creating a barrier against excess water penetration.
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  Easy-to-Apply & VOC Compliant A one-component, water-based formula that meets VOC regulations, making it a user-friendly and environmentally responsible choice for surface protection.