Deck sealant is a product designed to protect your outdoor deck from the elements. It is formulated to resist water, sun damage, and wear and tear. This sealant will help keep your deck looking new and beautiful for years to come. It also helps extend the life of your deck by preventing wood rot, fading, and warping. It is easy to apply and dries quickly, providing a long-lasting waterproof barrier. Deck sealant is available in a variety of colors to match the look of your outdoor deck. It is a great way to protect your investment and keep your deck looking like new.
Top 10 Best Deck Sealant, Expert-Approved Choices
1#. Thompson’s Water Seal Semi-Transparent Wood Sealer, Sedona Red, 1 Gallon
Features
Durable Protection from Water & Sun Damage
Year-Round Protection in Just One Coat
Enhances Wood Grain
Guaranteed 5 Years on Decks, 7 Years on Fences and Siding
Exceeds Industry Standard ASTM D-4446 for Waterproofing Wood
2#. Thompson’s Water Seal Semi-Transparent Wood Sealer, Chestnut Brown, 1 Gallon
Features
Durable Protection from Water & Sun Damage
Year-Round Protection in Just One Coat
Enhances Wood Grain
Guaranteed 5 Years on Decks, 7 Years on Fences and Siding
Exceeds Industry Standard ASTM D-4446 for Waterproofing Wood
3#. Olympic Stain Smartguard Concentrated Multi-Surface Sealant, Clear, 15oz
Features
Stain Your Deck Quickly And Easily – Olympic Smart guard is a patent-pending deck stain product that allows you to simply spray on the sealant eliminating the need for back-brushing your deck.
Simple Stain Process – To apply Olympic SmartGuard Deck Sealant simply pour the pouch into a deck sprayer, add 2 gallons of water, and then spray over your deck – it works on traditional wood decks, concrete, and even composite decking!
Quick Dry – Dries in 1 hour so you can entertain or spend time outdoors with less hassle and less disruption. Apply this deck sealant quickly and get back to enjoying your day.
Use Even After Rain – Can be applied after cleaning or rain ensuring you get to have fun on your deck as quick as possible
Durable – Strong durability and waterproofing protection makes Olympic Smart Guard the smart choice for any homeowner who wants to seal their wood or composite deck quickly and still enjoy the outdoors.Multi-Surface Use – While many deck sealants only work on wood, Olympic Smart Guard works as a sealant on Wood Decks, Concrete Patios, Masonry, and even weathered Composite Decks.A Trusted Name In Deck Stain Technology – The Olympic brand has been trusted to provide quality results since 1938. Its history of excellence and expertise has made Olympic Stains a category leader with a reputation for delivering innovation and durability at an affordable price. Gorgeous results are always guaranteed with Olympic Stains. With a full range of exterior stains, resurfaces and wood cleaners, we have the products you need to complete your next wood staining project right.
4#. DEFY Crystal Clear Composite Deck Waterproofing Sealer, 1 Gallon
Features
WATER-BASED, CLEAR COMPOSITE DECK SEALER – This water based, clear wood and deck sealer protects composite wood from the harmful effects of the sun, while adding little to no change to the natural look of your composite deck.
FORTIFIED WITH ZINC NANO-PARTICLE TECHNOLOGY– It’s like sunscreen for your wood. Tiny zinc particles dispersed throughout the stain reflect damaging UV rays, preventing premature graying and color loss.
EXTREMELY DURABLE, HIGH QUALITY RESINS – DEFY Composite Deck Sealer is made with the highest quality resins available that have better resistance to fading and darkening. The result is a quality sealer that typically lasts a season or two longer than competitive products.
QUALITY THAT LASTS – DEFY Extreme Composite Deck Sealer is a premium-grade, clear deck sealer that is built to last. Keep your weathered composite deck, or fence looking great for longer by using DEFY.
EASY TO MAINTAIN – When it’s time to do a maintenance coat, there’s no need to strip the surface. Make sure the surface is clean, then apply a single maintenance coat of DEFY Composite Waterproofing Sealer.
5#. Seal-Once Nano Penetrating Wood Sealer – Premium Waterproof Sealant – 1 Gallon Clear Wood Sealant
Features
CLEAR SEALANT: Our water-based sealer 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 decks and fences, 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 gloss is ultra-low VOC and great for enhancing the extended life of your exterior flooring.
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.
6#. Seal-Once Nano+Poly Penetrating Wood Sealer with Polyurethane – Premium Waterproof Sealant -1 Gallon & Clear
Features
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 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.
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.
7#. Thompson’s WaterSeal TH.024101-16 Multi-Surface Waterproofer, Clear, 1 Gallon
Features
Prevents Water Damage
Beads and Waterproofs
Allows Wood to Gray Naturally
Use When Mildew and Biological Factors are not a Problem
For use on Terra Cotta Planters, Birdhouses, Mailbox Posts and Other Small Exterior Surfaces
8#. Ready Seal 512 5-Gallon Pail Natural Cedar Exterior Stain and Sealer for Wood
Features
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.
May be applied using sprayer, roller or brush onto the woods surface.
Requires no back brushing and will nerver leave runs, laps, or streaks.
Requires no wet-line application, the product will blend itself and can be applied in any temperature range for proper application.
Requires no diluting or thinning prior to spray applications.
Subject to or will include a PaintCare recycling fee in the following states: CT, or VT. Not available in CA.
Easy maintenance – no sanding or stripping required for re-application
Includes repairs, parts, labor and Transport
COVERAGE: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use covered for portable products and power surges covered from day one. Malfunctions covered after the manufacturer’s warranty.
EASY CLAIMS PROCESS: File a claim anytime online. Most claims approved within minutes. If we can’t repair it, we’ll send you an Amazon e-gift card for the purchase price of your covered product or replace it.
MORE DETAILS: Additional information about this protection plan is available within the “Product guides and documents” section. Simply click “User Guide” for more info. Asurion will also email your plan confirmation with Terms & Conditions to the address associated with your Amazon account within 24 hours of purchase (if you do not see this email, please check your spam folder).
9#. Seal-Once Marine Premium Wood Sealer – Waterproof Sealant – Wood Stain and Sealer in One – 1 Gallon & Clear
Features
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.
10#. THOMPSONS WATERSEAL 21802 VOC Wood Protector, 1.2-Gallon, Clear
Features
Item Weight: 9.65 lb
Country of Origin: China
Brand name: Thompson’s Water Seal
Item Dimensions: 4.1″L x 6.6″W x 11.0″H
