10 Best Clear Deck Sealer of December 2025

• 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

Thompson's Water Seal

• Liquid concentrate formula makes 1 gallon of commercial grade water repellent
• Safe around plants, people and pets
• Eco-safe, low VOC, low odor formula is safe to walk on in less than 2 hours
• Ideal for use on wood decking, wood fences, plywood, wood shingles, wood siding and much more
• Vapor permeable (breathable) water repellent can be used on new wood

Eco Advance

• 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

SEAL-ONCE

• 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.

DEFY

• WATER-BASED, CRYSTAL CLEAR WOOD STAIN – This environmentally friendly, water based, clear deck stain prevents graying caused by the harmful effects of the sun, while adding little to no change to the natural look of your wood. 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, QUALITY THAT LASTS – 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 semi-transparent deck stain that typically lasts a season or two longer than competitive products. Keep your deck, fence or siding looking great for longer by using DEFY premium wood stains.
• 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.
• 250 VOC COMPLIANT - Ships to all states except California. California residents can purchase DEFY Extreme 40, which is VOC Compliant in California.

DEFY

• High quality product
• High durable product
• Manufactured in United States

OLYMPIC/PPG ARCHITECTURAL FIN

• Prevents surface damage from rain, snow, ice with a satisfaction guarantee for up to five years
• Does not alter surface appearance, does not leave a surface film and helps prevent efflorescence
• Contains advanced UV stabilizers to ensure long lasting non-yellowing performance
• Concentrate formula - easily mixed, save money and great for the environment
• Apply a flood coat with a sprayer, brush or roller, no maintenance required and safe for People, Pets and Plants

Rain Guard

• Enhanced waterproofing protection to help make sure your wood is protected from cracking due to water

Olympic Stain

• 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

Thompson's Water Seal

• Requires no primer
• May be applied using sprayer, roller or brush
• Requires no back brushing or wet-line application
• Can be applied in any temperature range

Ready Seal