Best Deck Sealant

Mick

By Mick

| Updated 3 Days Ago

  • Deck sealants are essential for maintaining the beauty and integrity of your outdoor space. They protect wooden decks from various elements like rain, sun, and temperature changes. With the right sealant, you can prolong the life of your deck and keep it looking great for years.

    Choosing the best deck sealant can be challenging because there are many factors to consider. The type of wood, the climate you live in, and the sealant’s ease of application all play a role. Some sealants are better for UV protection, while others excel in preventing water damage. It is crucial to pick a sealant that fits your specific needs.

    We spent countless hours researching and testing various deck sealants to identify the ones that provide the best protection and ease of use.

    Best Deck Sealants

    Here is our complete guide to the best deck sealants. These products will help protect and enhance the beauty of your outdoor space.

  • Seal-Once Marine Premium Wood Sealer

    10

    This product is a strong choice for those wanting long-lasting protection for their outdoor wood projects.

    Pros

    • Easy application and quick drying
    • Effective waterproofing and UV protection
    • Safe to use around plants and animals

    Cons

    • May require multiple coats for best results
    • Can be tricky to apply evenly
    • Some reports of leaking packaging

    We had a great experience with the Seal-Once Marine Premium Wood Sealer. The application was straightforward, and the product dried much faster than we expected. After two coats, our deck looked refreshed and well-protected.

    The wood sealer creates an impressive water-resistant barrier. We were especially pleased with its performance in various weather conditions. Additionally, knowing it is safe for aquatic life and plants made us feel confident using it around our home.

    One thing to note, though, is that achieving an even coat can be a bit challenging. We recommend taking your time with the application process. Despite this, the benefits far outweigh any minor inconveniences.

    Seal-Once Marine Premium Wood Sealer
    • 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.
  • Thompson’s WaterSeal Multi-Surface Waterproofer

    9.7

    This product is excellent for anyone looking to protect their outdoor surfaces with ease and confidence.

    Pros

    • Simplifies the sealing process with one-coat application
    • Effectively enhances and preserves natural wood color
    • Provides long-lasting UV and water protection

    Cons

    • Can be tricky to get the perfect even finish
    • Requires thorough surface cleaning prior to use
    • May take longer to dry in humid conditions

    Using Thompson’s WaterSeal made our deck maintenance a breeze. The one-coat application was indeed as simple as promised, saving us a lot of time and effort. The clear finish allowed the natural grain of the wood to show through beautifully, ensuring our deck looked both natural and attractive.

    The advanced polymers in this formula kept the color from fading, even when exposed to the sun and rain. We noticed that even after a few months, the wood surface remained protected and the water beaded up just as it did when freshly applied. This gave us peace of mind knowing our deck would stay in good shape year-round.

    One minor issue was getting an even finish, especially on the larger surfaces. Ensuring the wood was thoroughly clean prior to application also required some extra preparation. Despite these small hurdles, the overall ease of use and the benefits provided made Thompson’s WaterSeal a solid choice for outdoor projects.

    Feel free to give it a try and watch your deck stay vibrant and protected through all seasons.

    Thompson’s WaterSeal Multi-Surface Waterproofer
    • 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.
  • DEFY Crystal Clear Composite Deck Waterproofing Sealer

    9.5

    This is a solid option for anyone looking to refresh and protect their composite deck.

    Pros

    • Easy to apply
    • Improves deck appearance
    • Provides good water resistance

    Cons

    • Can be pricey
    • May not cover stains well
    • Coverage area could be better

    We had the chance to use the DEFY Crystal Clear Composite Deck Waterproofing Sealer recently. Our deck was looking tired and faded, especially after years of exposure to the elements. This sealer was easy to apply with a brush and sprayer, making the job less of a hassle.

    Not only did our deck look refreshed and brighter, but the water resistance was noticeably improved. We even did a quick hose test afterward and saw water bead up on the surface. That was a clear sign that the sealer was doing its job.

    On the downside, it didn’t do much for some of the deeper stains. We also think the stated coverage area is a bit optimistic, so you might need more product than initially expected. Despite these minor drawbacks, the overall performance of this sealer made it worth the investment.

    Another positive note is that it dried clear, keeping the natural look of the wood. The application took less time than we anticipated, and cleanup was straightforward, which is always a plus. If you’re looking to enhance and protect your composite deck, this sealer is a reliable choice.

    Sale
    DEFY Crystal Clear Composite Deck Waterproofing Sealer
    • Defy Composite Deck Waterproofing Sealer 1 Gallon
  • Gorilla Waterproof Caulk & Seal

    9.4

    This sealant is a dependable choice for anyone looking to protect their surfaces from water and moisture.

    Pros

    • Quick water exposure readiness
    • Resistant to mold and mildew
    • Long-lasting and durable

    Cons

    • Not usable on damp or contaminated surfaces
    • Cannot be painted over
    • Limited to specific materials

    We recently tried the Gorilla Waterproof Caulk & Seal on our kitchen sink, and the results were impressive. The sealant dried quickly, making it easy to use, especially when we needed it to be water-resistant within 30 minutes. The white color blended well with our fixtures, making the application almost invisible.

    One standout feature was its resistance to mold and mildew. Even in our humid bathroom, we noticed no signs of yellowing or cracking after a few weeks. This kind of longevity is hard to find in many other sealants.

    Overall, using this product was straightforward. The instructions were clear, and the application felt smooth. We did hit a snag since it can’t be applied on wet surfaces, but with a little planning, this minor inconvenience was manageable. It’s definitely a reliable sealant for various indoor and outdoor projects.

    Sale
    Gorilla Waterproof Caulk & Seal
    • SEALS OUT WATER, AIR AND MOISTURE: Gorilla Waterproof Caulk & Seal 100% Silicone Sealant* seals out water, air and moisture and is great for kitchen, bath, window, doors, auto, marine, plumbing, gutters and more! *as cured
  • Loctite Tite Foam Gaps & Cracks

    9.3

    For anyone dealing with annoying gaps and cracks, this foam sealant is a reliable choice.

    Pros

    • Easy to apply
    • Expands to fill large gaps
    • UV resistant

    Cons

    • Can overfill if not careful
    • Requires precise nozzle attachment
    • Removal from hands is tough

    We found the Loctite Tite Foam to be incredibly easy to use. The application process was straightforward, and it expanded effectively to fill even the largest gaps we encountered. This ensures excellent insulation and keeps out moisture and pests.

    Its durability really impressed us. The foam maintained its integrity even under intense sunlight, thanks to its UV resistance. It’s a long-lasting solution that you won’t need to revisit frequently.

    There are a few things to watch out for when using this product. It’s easy to overfill holes if you’re not careful, so take your time. Also, double-check that the nozzle is securely attached before starting to avoid any mishaps. And don’t forget gloves; cleaning foam off your hands is no fun.

    Overall, we’re pleased with how well the Loctite Tite Foam performed for sealing minor and major cracks. It made our home improvement projects smoother and more efficient.

    Loctite Tite Foam Gaps & Cracks
    • Expands To Fill: Loctite Tite Foam Gaps & Cracks fills, seals, and insulates effectively around gaps and cracks up to 1 inch in size
  • MIKOSI Weather Stripping Door Seal Strip

    9.1

    We’ve found this product to be efficient for keeping drafts and noise at bay.

    Pros

    • Great adhesion
    • Easy to install
    • Effective insulation

    Cons

    • Not ideal for wood surfaces
    • Loses stickiness over time
    • Requires prep work

    This weather stripping by MIKOSI has truly come in handy. We applied it to various doors and windows around our home and were pleased with how much quieter and cozier our space became. The simple, straightforward installation made the whole process a breeze.

    The strip’s flexibility allowed it to fit snugly into different gaps, ensuring no cold air or insects could sneak in. We did notice, though, that it didn’t perform as well on wood. The adhesive seemed to struggle with staying put on varnished surfaces. On metal and glass, it held firm and provided an excellent seal.

    A small drawback is that the adhesive starts to weaken after a few months, requiring us to consider reapplying it or finding a more permanent solution. Overall, for its price and ease of use, it’s a solid choice for draft-proofing your home.

    Sale
    MIKOSI Weather Stripping Door Seal Strip
    • 【8 Meter Weather Stripping for Doors】MIKOSI 26 Feet Door Seal Strip length of the roll reduces the waste of materials in use and seals more doors and Windows. The sealing strip is excellent flexibility,high resilience and super Durable,it is great for family use. The sealing strip uses super glue for long lasting adhesion.Silicone Seal Strip.
  • DOMINATOR SG+ Clear Acrylic Sealer

    9

    This sealer is a great choice for giving your deck a fresh, glossy look while ensuring long-lasting protection.

    Pros

    • Eye-catching glossy finish
    • Strong protection against spills
    • Easy and quick application

    Cons

    • Requires specific temperatures
    • Not suitable for all surfaces
    • Possible shipping errors

    We recently used the DOMINATOR SG+ Clear Acrylic Sealer on our backyard patio, and we’re impressed with the high-gloss, wet-look finish it provided. The sealer made the concrete pavers look brand new and added a touch of elegance to our outdoor space.

    Applying the sealer was straightforward thanks to the easy spray-on method and helpful video guides. It dried quickly between coats, so we were able to complete the project in just one day. The lack of harsh odors was a pleasant bonus, making the whole process more comfortable.

    One thing to note is the temperature requirement. Be mindful of this if you live in an area with fluctuating weather. Also, make sure to double-check the product upon delivery to avoid any mix-ups. If used correctly, this sealer will save time and maintenance effort for years.

    DOMINATOR SG+ Clear Acrylic Sealer
    • COLD WEATHER WARNING: Do not apply if surface temperature is expected to be below 50° for 48 hours before & after application. ENHANCE the life and beauty of your surface (wet look) and a high gloss finish for 2-4 years before the need to reseal (depending on your environment).
  • #1 Deck Premium Wood Fence Stain and Sealer

    8.7

    If you’re looking to protect your deck with an easy-to-apply sealant, we think this product could be a solid choice.

    Pros

    • Long-lasting protection
    • Easy application with different tools
    • Low odor and easy cleanup

    Cons

    • Limited to outdoor wood use
    • Not ideal for composite lumber
    • Requires multiple coats for best results

    We recently used the #1 Deck Premium Wood Fence Stain and Sealer on our wooden deck and were impressed with its performance. The semi-transparent finish allowed the natural beauty of the wood grain to shine through, making our deck look both protected and aesthetically pleasing.

    The application process was straightforward. We decided to use a brush and roller, but it’s comforting to know that an airless or pump sprayer would work just as well. Cleanup was a breeze since it’s water-based. Just soap and water were enough to clean our tools.

    Although the stain provided excellent protection against UV rays and water damage, be prepared to apply multiple coats for the best results. This product might not be the best choice for those with composite lumber decks, but for natural wood, it’s a reliable option that performs admirably.

    #1 Deck Premium Wood Fence Stain and Sealer
    • Long Lasting Fence Sealer - 3 Year Warranty on Fences
  • Ready Seal Natural Cedar Stain and Sealer

    8.7

    This product is an excellent choice for those wanting to enhance the beauty of their wooden deck while also providing reliable protection.

    Pros

    • No primer needed
    • Easy roller, brush, or spray application
    • Blends well, no streaks

    Cons

    • Takes 14 days to reach final color
    • Not for use on previously stained surfaces
    • Costly in some regions due to recycling fees

    We found the Ready Seal Natural Cedar Stain and Sealer very easy to apply. Using a garden sprayer made the process quick and efficient. The oil-based formula penetrates deeply into the wood, providing thorough protection against mold, mildew, and UV damage.

    After applying, we observed the surface blended effortlessly without leaving any streaks, laps, or runs. This “goof-proof” nature ensures that even beginners can achieve a professional finish. The stain enhances the wood’s natural texture and grain, giving the deck a rich, vibrant appearance.

    One downside is the time it takes to reach its true color—approximately 14 days. If you’re in a hurry for immediate results, this might be a drawback. However, the long-lasting protection it offers compensates for the wait. It’s important to note that this product is unsuitable for painted or newly stained surfaces.

    Despite the cons, the Ready Seal serves as a reliable and effective option to maintain and beautify your exterior wood projects. Its durability and ease of maintenance make it a worthwhile investment.

    Sale
    Ready Seal Natural Cedar Stain and Sealer
    • Requires no primer. Ready Seal is darkest when first applied. It reaches its true color in approximately 14 days. Do not apply Ready Seal over painted or newly stained surfaces. Sealed surfaces inhibit penetration.
  • Olympic Maximum Deck Stain

    8.6

    Want to get your deck ready even in unpredictable weather? This stain might be what you need.

    Pros

    • Applies well even in different temperatures
    • Waterproofing helps protect the wood
    • Keeps the wood grain visible

    Cons

    • May not cover as much area as expected
    • Color could be darker than anticipated
    • Requires proper surface prep for best results

    We found the Olympic Maximum Deck Stain to be very versatile. It’s great to apply it even after a rain, making the project easier to fit into a busy schedule. The semi-transparent look keeps the natural beauty of the wood.

    The waterproofing feature is impressive. This product seals the deck effectively, keeping it safe from moisture and weather damage. During application, the stain spreads evenly and dries relatively quickly.

    It’s worth noting that the color might appear darker on the wood than it looks in the can. Make sure you prepare the deck surface well to achieve the best results. Overall, using this stain can save time and provide long-lasting protection.

    Sale
    Olympic Maximum Deck Stain
    • Weather-ready application allows you to clean and stain on the same day in temperatures down to 35°F, stain is ready for rain in 8 hours

Buying Guide

When choosing the best deck sealant, we need to consider a few key factors. Each deck is unique and has different needs based on material, age, and exposure to weather.

Type of Deck Sealant

  • Water-based: Easy to clean, environmentally friendly, and quick drying.
  • Oil-based: Offers deeper penetration and longer-lasting protection but takes more time to dry and clean up.

Protection Needs

  1. UV Protection: Prevents wood from fading and becoming brittle.
  2. Water Resistance: Keeps moisture out to prevent warping and rotting.
  3. Mildew Resistance: Stops mold and mildew from growing, important in damp climates.

Ease of Application

Some sealants require multiple coats, while others are one-coat applications. We should consider our time and effort constraints here.

Durability

Let’s think about how long the sealant will last. Frequent reapplication is tedious, so a long-lasting product is better in the long run.

FeatureImportanceNotes
Type (Water/Oil)HighChoose based on ease of application and cleanup.
UV ProtectionHighProtects from the sun’s harmful rays.
Water ResistanceHighPrevents moisture damage.
Mildew ResistanceMediumImportant in humid environments.
ApplicationMediumLook for ease of use and required coats.
Drying TimeMediumQuicker drying means faster project completion.
DurabilityHighLonger-lasting protection saves time and money.

Before purchasing, always read the product labels and user reviews to understand the sealant’s real-world performance. This will help us make a more informed decision.