Best deck sealers – Top 8 of 2020

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We checked out thousands reviews, and put together a list of the top sellers. Check out the top deck sealers below.


SaleNo. 1
Ready Seal 512 5-Gallon Pail Natural Cedar Exterior Stain and Sealer for Wood
500 Reviews
Ready Seal 512 5-Gallon Pail Natural Cedar Exterior Stain and Sealer for Wood
  • Requires no primer. Ready Seal is darkest when first applied. It reaches its true color in approximately 14 days. Do not apply Ready Seal...
  • 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.
No. 2
DEFY Crystal Clear Composite Deck Waterproofing Sealer, 1 Gallon
38 Reviews
DEFY Crystal Clear Composite Deck Waterproofing Sealer, 1 Gallon
  • WATER-BASED, CLEAR COMPOSITE DECK SEALER – This water based, clear wood and deck sealer protects composite wood from the harmful effects...
  • FORTIFIED WITH ZINC NANO-PARTICLE TECHNOLOGY– It’s like sunscreen for your wood. Tiny zinc particles dispersed throughout the stain...
  • EXTREMELY DURABLE, HIGH QUALITY RESINS – DEFY Composite Deck Sealer is made with the highest quality resins available that have better...
  • QUALITY THAT LASTS – DEFY Extreme Composite Deck Sealer is a premium-grade, clear deck sealer that is built to last. Keep your weathered...
  • 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...
No. 3
Olympic Stain Maximum Deck Stain, Cedar, 1-Gallon
64 Reviews
Olympic Stain Maximum Deck Stain, Cedar, 1-Gallon
  • Enhanced waterproofing protection to help make sure your wood is protected from cracking due to water
No. 4
SEAL-ONCE MARINE - 1 Gallon Penetrating Wood Sealer, Waterproofer & Stain. Water-Based, Ultra-low VOC formula for...
22 Reviews
SEAL-ONCE MARINE - 1 Gallon Penetrating Wood Sealer, Waterproofer & Stain. Water-Based, Ultra-low VOC formula for...
  • 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
No. 5
SEAL-ONCE NANO+POLY Penetrating Wood Sealer with Polyurethane - 1 Gallon. Water-based, Low-VOC, waterproofer & stain for...
12 Reviews
SEAL-ONCE NANO+POLY Penetrating Wood Sealer with Polyurethane - 1 Gallon. Water-based, Low-VOC, waterproofer & stain for...
  • Water-based sealer with advanced penetrating nanotechnology & added strength of Polyurethane. This premium wood sealer performs like an...
  • Great investment to enhance and extend the natural life of wood. Protects against water damage for up to 10 years on vertical surfaces & 6...
  • 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...
  • 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...
No. 6
THOMPSONS WATERSEAL TH.043841-16 Solid Waterproofing Stain, Acorn Brown
50 Reviews
THOMPSONS WATERSEAL TH.043841-16 Solid Waterproofing Stain, Acorn Brown
  • 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
No. 7
STORM SYSTEM Storm Protector Penetrating Sealer & Stain Protector - Deck Protector, Fence Protector, Mahogany Stain,...
  • Wood deck protector - A true oil-based semi transparent stain and sealer meant to protect and highlight the natural beauty of the wood...
  • Storm Wood Stain Protector is a semi transparent sealer that penetrates deep into the wood for added protection against Mother Nature.
  • Compatible with any wood species. Great for wood staining Mahogany, as a Mahogany sealer, Cedar sealer, Cedar fence sealer, Redwood, Pine...
  • Great for Decks, Fences, Siding, and other Wood Substrates. Can be used as a wood fence protector or any other wood substrate protector.
  • Applies easily with brush, roller, or spray application. Lap-Free Application & UV Protection
No. 8
#1 Deck Wood Deck Paint and Sealer - Advanced Solid Color Deck Stain for Decks, Fences, Siding - 1 Gallon (Driftwood...
13 Reviews
#1 Deck Wood Deck Paint and Sealer - Advanced Solid Color Deck Stain for Decks, Fences, Siding - 1 Gallon (Driftwood...
  • Opaque Finish Completely Hides Wood Grain & Provides Maximum Protection Against Fading & Graying Caused by Damaging UV Rays
  • Acts as Both a Stain and Sealer for Your Wood - Use Over Top of Existing, Solid Color Wood Stains (that still have good adhesion)
  • Available in 6 Beautiful, Solid Color Finishes That Dry to a Flat, Natural Looking Finish
  • Low Odor Stain, Water-Based Cleanup - Low VOCs (<60 g/L)
  • For Use on all Horizontal and Vertical Wood Surfaces Including Pressure Treated Lumber, Pine, Cedar, Fir, Redwood, Mahogany, & More