10 Best Deck Water 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

• Exterior wood stain and sealer that provides complete outdoor wood protection
• Formula is moderately pigmented to add beautiful color, but still show some wood texture and grain.
• Prevents Water Damage; Coating Resists Mildew and UV Damage
• Advanced Polymers Provide Fade Resistant Color
• Applies to Freshly Cleaned Damp or Dry Wood; Color: Acorn Brown
• Exceeds Industry Standard ASTM D-4446 for Waterproofing Wood
• 1 coat protects 4 years on deck & 6 years on fences and sidings

Thompson's Water Seal

• 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

Thompson's Water Seal

• 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

• Ready to use commercial grade formula can be applied using a standard
• Ideal for use on wood decking, wood fences, plywood, wood shingles, wood siding and much more
• Protects against water damage, oil, stains, mold, mildew, de-icing salts, and pool/spa chemicals
• Water-based, non-toxic, non-flammable formula does not harm landscape plantings
• Vapor permeable (breathable) water proofer can be used on new wood

Eco Advance

• 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

• 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

• 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

Thompson's Water Seal

• 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

• 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

Ready Seal