10 Best Wood Deck Sealers 2020

Gareth Otwell Reviewed by Gareth Otwell | Last Updated:

After analyzing 489 products, scanning 2445 reviews, spending more than 36 hours of research and speaking with our test users, we think the Ready Seal 512 5-Gallon Pail Natural Cedar Exterior Wood Stain is the one of the Best Wood Deck Sealer on the market.

# Image Name Brand Price
1
⭐Best Choice
Ready Seal 512 5-Gallon Pail Natural Cedar Exterior Wood Stain
Ready Seal 512 5-Gallon Pail Natural Cedar Exterior Wood Stain and Sealer Check price Ready Seal $$$$$ Check price
2
Best under $100
SEAL-ONCE MARINE
SEAL-ONCE MARINE - 1 Gallon Penetrating Wood Sealer, Waterproofer & Stain. Water-Based, Ultra-low VOC formula for high-moisture areas to protect wood docks, decks, piers & retaining walls. Check price SEAL-ONCE $$$$$ Check price
3
Best under $50
Thompsons WaterSeal TH.A21711-16 Advanced Natural Wood Protector
Thompsons WaterSeal TH.A21711-16 Advanced Natural Wood Protector, gallon Check price Thompson's Water Seal $$$$$ Check price
4
💲Best value for the money
Olympic Stain Waterguard Waterproofing Sealant for Decks
Olympic Stain Waterguard Waterproofing Sealant for Decks, Fences, and Siding, Clear, 1-Gallon Check price Olympic Stain $$$$$ Check price
5 SEAL-ONCE NANO+POLY Penetrating Wood Sealer with Polyurethane SEAL-ONCE NANO+POLY Penetrating Wood Sealer with Polyurethane - 1 Gallon. Water-based, Low-VOC, waterproofer & stain for decks, fences & log homes. Check price SEAL-ONCE $$$$$ Check price
6
👑Premium Pick
ToughTimber
ToughTimber - Waterproof Deck Sealer, Wood Sealer, Cedar Roof Sealer - Great for Porous Wood As Waterproof Sealer and Water Repellent Check price Quest Chemicals $$$$$ Check price
7 #1 Deck Premium Semi-Transparent Wood Stain for Decks #1 Deck Premium Semi-Transparent Wood Stain for Decks, Fences, Siding - 1 Gallon (Natural) Check price SaverSystems $$$$$ Check price
8 THOMPSONS WATERSEAL TH.042851-16 Semi-Transparent Waterproofing Stain THOMPSONS WATERSEAL TH.042851-16 Semi-Transparent Waterproofing Stain, Woodland Cedar Check price Thompson's Water Seal $$$$$ Check price
9 EcoProCote Acri-Soy Penetrating Concrete and Wood Sealer | Non-Toxic Porous EcoProCote Acri-Soy Penetrating Concrete and Wood Sealer | Non-Toxic Porous Surface Sealer | Non-Peeling 1 Gallon Check price EcoProCote $$$$$ Check price
10 DEFY Extreme 1 Gallon Semi-Transparent Exterior Wood Stain DEFY Extreme 1 Gallon Semi-Transparent Exterior Wood Stain, Cedar Tone Check price DEFY $$$$$ Check price

Ready Seal 512 5-Gallon Pail Natural Cedar Exterior Wood Stain – Best Overall Wood Deck Sealer

Ready Seal 512 5-Gallon Pail Natural Cedar Exterior Wood Stain
  • 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.
  • "Goof Proof" application
  • No laps, runs or streaks
  • No back brushing
  • Apply in any temperature
  • Subject to or will include a PaintCare recycling fee in the following states: CA, OR, CT, VT

SEAL-ONCE MARINE – Best under $100

SEAL-ONCE MARINE
  • Specially Formulated to be Applied Around & Over Fresh or Salt Water
  • Water-based, Low VOC, Non-toxic; Safe for People, Pets, Plants & Marine Life
  • Superior Nanotechnology Penetrates Deep, Coating Wood Fibers at the Cellular Level
  • Performs like an Oil-Based Sealer Without any Harmful Chemicals or Side Effects
  • Creates a Flexible, Breathable Barrier that Enhances, Stabilizes & Protects Wood

Thompsons WaterSeal TH.A21711-16 Advanced Natural Wood Protector – Best under $50

Thompsons WaterSeal TH.A21711-16 Advanced Natural Wood Protector
  • Long-Lasting Coating Resists Mildew Growth, UV Damage and Fading
  • One Day Project - Applies to both damp or dry wood in just one coat
  • Water-Based for Easy Soap and Water Clean Up
  • Waterproofer product
  • Use on decks, fences, exterior furniture and exterior wood
  • Maximum strength one coat waterproofer
  • Advanced protection against water damage
  • Exceptional, long lasting beading and waterproofing

Olympic Stain Waterguard Waterproofing Sealant for Decks – Best Budget Wood Deck Sealer

Olympic Stain Waterguard Waterproofing Sealant for Decks
  • A waterproofing clear sealant
  • Protects against water damage and creates a mildew-resistant coating
  • Easy water cleanup

SEAL-ONCE NANO+POLY Penetrating Wood Sealer with Polyurethane

SEAL-ONCE NANO+POLY Penetrating Wood Sealer with Polyurethane
  • Water-based sealer with advanced penetrating nanotechnology & added strength of Polyurethane. This premium wood sealer performs like an Oil-based product, without any noxious solvents or toxic chemicals.
  • Great investment to enhance and extend the natural life of wood. Protects against water damage for up to 10 years on vertical surfaces & 6 years on horizontal.
  • Ultra Low-VOC wood sealer safe for people, pets, plants or marine life. Easy to apply with soap & water clean-up. Save time with wet on damp application.
  • Prevents warping, cupping, wood rot, mold, mildew, staining, decay & will not peel like many topical sealers that only form a top-coat.
  • When used as a wood stain creates a UV barrier to prevent fading. Rich color palette available in 11 different color tints. Clear formula allows wood to turn gray naturally

ToughTimber – Premium Pick

ToughTimber
  • High End/Industrial Grade Wood, Roof, and Deck Sealer proving protection for years to come! Making your Deck, Wood, Cedar Roof, Cedar Shingles, and Wood Fences water repellent. ToughTimber penetrates deep within the wood for BEST protection.
  • Prevents Against Mold and Mildew - Silane/Siloxane penetrates deep into the wood reducing wood water up-take by 95% protecting it against the elements and preserves the wood for longer periods of time. It is also stain resistant to oil, gas, and anti-freeze.
  • Easy to use - Same day, one coat application. Goes on cloudy and dries clear with a slight gloss sheen.
  • Mix this one gallon jug with 1-4 gallons water, depending on protection desires. Covers up to 1,000 sq ft.

#1 Deck Premium Semi-Transparent Wood Stain for Decks

#1 Deck Premium Semi-Transparent Wood Stain for Decks
  • Protects wood from damaging UV rays
  • Acts as both a deck stain and deck sealer for your wood
  • Available in 4 beautiful, semi-transparent finishes that dry to a flat, natural looking finish
  • Low VOCs (<50 g/L) - Water-based, easy cleanup
  • For use on all softwood types including pressure treated pine, cedar, fir or redwood

THOMPSONS WATERSEAL TH.042851-16 Semi-Transparent Waterproofing Stain

THOMPSONS WATERSEAL TH.042851-16 Semi-Transparent Waterproofing Stain
  • Prevents Water Damage
  • Advanced Polymers Provide Fade Resistant Color
  • Coating Resists Mildew and UV Damage
  • Applies to Freshly Cleaned Damp or Dry Wood
  • Exceeds Industry Standard ASTM D-4446 for Waterproofing Wood

EcoProCote Acri-Soy Penetrating Concrete and Wood Sealer | Non-Toxic Porous

EcoProCote Acri-Soy Penetrating Concrete and Wood Sealer | Non-Toxic Porous
  • LONG-LASTING SURFACE FINISH: The penetrating concrete sealer and protective wood sealer, gives a surface finish that can last a lifetime. Immune to peeling and flaking, it provides resistance from moisture, stains, dust, and mold.
  • IDEAL FOR POROUS SURFACES: Formulated with plant-based 100% acrylic hybrid soy oil emulsions, this porous sealer penetrates the surface thoroughly and is perfect for use on concrete, wood, brick, and tile grouts. Penetrates like an oil, performs like a solvent, dries and cleans like a water-based sealer. Advanced chemistry at its best.
  • FIRST OR LAST LAYER OF PROTECTION: Extend the life and appearance of your surface by applying this penetrating sealer as the base or final finish. Build on it further with our Eco-Poly Polyurethane sealer to change the sheen and impart extra surface barrier protection or keep the natural matte seal.
  • MULTIPLE USES: Garage floors, concrete floors, wood decks, natural stones, driveway, paver, block walls, wood crafts, and more- the porous surface sealer is multi-purpose and versatile. Not intended to leave a topical film or to be applied on dense or previously sealed surfaces. Typical coverage is 400 - 600 sq.ft. per gallon.
  • LOW ODOR, GREEN BUILDING COMPLIANT, ECO-FRIENDLY: The Acri-Soy Wood Sealer and Concrete Sealer is 100% non-toxic, eco-friendly, and sustainable. Made with bio-renewable ingredients. It is virtually odorless, 0 VOCs, free of toxic emissions, and is Red List Chemicals free.

DEFY Extreme 1 Gallon Semi-Transparent Exterior Wood Stain

DEFY Extreme 1 Gallon Semi-Transparent Exterior Wood Stain
  • WATER-BASED SEMI-TRANSPARENT WOOD STAIN - This environmentally friendly, water based deck stain allows the wood grain to show through with a beautiful semi-transparent, natural matte finish. It's great for staining wood decks, fences, siding, playsets, outdoor patio furniture, and more.
  • 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 Extreme wood stains are made with the highest quality resins available that have better resistance to fading and darkening. The result is a quality wood stain that typically lasts a season or two longer than competitive products.
  • ENHANCED MILDEW RESISTANCE - The same zinc nano-particles that block damaging UV rays are also a natural deterrent to mold and mildew growth.
  • EASY TO MAINTAIN - When it's time to do a maintenance coat, there's no need to sand or strip the surface again. Simply brighten the wood with DEFY Wood Brightener and apply a single maintenance coat of DEFY Extreme Wood Stain.

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