10 Best Clear Penetrating Epoxy Sealer of 2025

Tested and Reviewed: Top 10 Clear Penetrating Epoxy Sealer deals with expert ratings from 8.1 to a perfect 10

March 2026 Edition

Editor's Choice

9.7

TotalBoat

TotalBoat Clear Penetrating Epoxy Wood Sealer Stabilizer for Rot Repair and Restoration (1.5 Quart, Traditional)

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Editor's bottom line:

“This clear penetrating epoxy sealer is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

WOOD HARDENER FOR ROTTED WOOD: two-part epoxy system seals, hardens, preserves, and protects all types of wood by stopping rot. Makes finishes like paint and varnish stick better and last longer. Easy to use treatment has no VOCs or harsh fumes
PENETRATING WOOD SEALER: An ideal dry rot treatment; this marine-grade epoxy resin is perfect for wooden boat restoration, wood repairs, and woodworking projects. Seal bare or new wood to protect against damage
CLEAR LOW VISCOSITY RESIN WITH MANY USES: Use on all softwoods, including cedar, cypress, fir, pine and redwood. Use on all hardwoods, including ipe, mahogany, maple, oak, and teak. Use on butcher block, live edge slabs, particle board, plywood, and OSB
WOOD ROT REPAIR EPOXY AVAILABLE IN TWO FORMULAS: Choose regular formula Penetrating Epoxy for 65-90 degrees F temps; Choose Cold Weather Penetrating Epoxy for 40-65 degrees F temps (Do not use Cold Weather formula above 65 F)
CHOOSE THE RIGHT EPOXY KIT SIZE FOR YOUR PROJECT: Both formulas are available in 1.5 Pint, 1.5 Quart, 0.75 Gallon, and 1.5 Gallon sizes. Simple 2 parts resin to 1 part hardener mix ratio for reliable results every time. Easy cleanup with soap and water

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9.5

TotalBoat

TotalBoat Clear Penetrating Epoxy Wood Sealer Stabilizer for Rot Repair and Restoration (1.5 Gallon, Traditional)

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Main Highlights

WOOD HARDENER FOR ROTTED WOOD: two-part epoxy system seals, hardens, preserves, and protects all types of wood by stopping rot. Makes finishes like paint and varnish stick better and last longer. Easy to use treatment has no VOCs or harsh fumes
PENETRATING WOOD SEALER: An ideal dry rot treatment; this marine-grade epoxy resin is perfect for wooden boat restoration, wood repairs, and woodworking projects. Seal bare or new wood to protect against damage
CLEAR LOW VISCOSITY RESIN WITH MANY USES: Use on all softwoods, including cedar, cypress, fir, pine and redwood. Use on all hardwoods, including ipe, mahogany, maple, oak, and teak. Use on butcher block, live edge slabs, particle board, plywood, and OSB
WOOD ROT REPAIR EPOXY AVAILABLE IN TWO FORMULAS: Choose regular formula Penetrating Epoxy for 65-90 degrees F temps; Choose Cold Weather Penetrating Epoxy for 40-65 degrees F temps (Do not use Cold Weather formula above 65 F)
CHOOSE THE RIGHT EPOXY KIT SIZE FOR YOUR PROJECT: Both formulas are available in 1.5 Pint, 1.5 Quart, 0.75 Gallon, and 1.5 Gallon sizes. Simple 2 parts resin to 1 part hardener mix ratio for reliable results every time. Easy cleanup with soap and water

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9.5

SMITH & COMPANY CPES

Smith's Original Clear Penetrating Epoxy Sealer™ [CPES] 2 Pint - Warm Weather Formula (WW)

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Main Highlights

Simple Mixing Ratio: 1 to 1 mixing ratio of Part A & Part B for easy and accurate application
Low Viscosity Formula: Made mostly from resins for superior penetration into porous surfaces
Extended Pot Life and Shelf Life: No rush or waste with extended working time and pro-grade longevity for long-term storage
Ultimate Cold-Weather Penetration: Bonds deep into wood, concrete, or masonry even below freezing - cures at temps as low as 25F without cracking or bubbling
Crystal-Clear Finish: Invisible protection that seals out moisture, rot, and stains while letting the natural grain shine through - no yellowing over time
Super-Strong Durability: Penetrates up to 1/4 inch providing defense against water, chemicals, and wear for decks, docks, or historic restorations
Fast Curing Time: Dries tack-free in 4-6 hours with full cure in 72 hours, non-toxic once cured
Breathable Seal: Seals while still allowing the wood to breathe for optimal moisture management
Made in the USA: Manufactured in California with quality craftsmanship and materials
Two-Part Epoxy System: Professional-grade sealer designed for restoration work, marine applications, and exterior carpentry projects

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9.2

TotalBoat

TotalBoat Clear Penetrating Epoxy Wood Sealer Stabilizer for Rot Repair and Restoration (1.5 Quart, Cold Weather)

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Main Highlights

WOOD HARDENER FOR ROTTED WOOD: two-part epoxy system seals, hardens, preserves, and protects all types of wood by stopping rot. Makes finishes like paint and varnish stick better and last longer. Easy to use treatment has no VOCs or harsh fumes
PENETRATING WOOD SEALER: An ideal dry rot treatment; this marine-grade epoxy resin is perfect for wooden boat restoration, wood repairs, and woodworking projects. Seal bare or new wood to protect against damage
CLEAR LOW VISCOSITY RESIN WITH MANY USES: Use on all softwoods, including cedar, cypress, fir, pine and redwood. Use on all hardwoods, including ipe, mahogany, maple, oak, and teak. Use on butcher block, live edge slabs, particle board, plywood, and OSB
WOOD ROT REPAIR EPOXY AVAILABLE IN TWO FORMULAS: Choose regular formula Penetrating Epoxy for 65-90 degrees F temps; Choose Cold Weather Penetrating Epoxy for 40-65 degrees F temps (Do not use Cold Weather formula above 65 F)
CHOOSE THE RIGHT EPOXY KIT SIZE FOR YOUR PROJECT: Both formulas are available in 1.5 Pint, 1.5 Quart, 0.75 Gallon, and 1.5 Gallon sizes. Simple 2 parts resin to 1 part hardener mix ratio for reliable results every time. Easy cleanup with soap and water

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9.0

MAS

MAS Epoxies Penetrating Epoxy Resin Wood Sealer, 1.5 Pint, 2-Part for Countertops, Wood Stain, Rot Repair and Restoration

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Main Highlights

Wood Epoxy Solution - Our two-part epoxy system seals, hardens, preserves, and protects all types of wood, effectively stopping rot. It enhances the adherence of finishes like paint and stain, prolonging their lifespan. This easy-to-use treatment is free of VOCs and harsh fumes.
Ideal Wood Sealer - This penetrating wood sealer is the perfect dry rot treatment. As a marine-grade epoxy resin, it's ideal for wooden boat restoration, wood repairs, and woodworking projects. It reinforces and protects bare or new wood against damage.
Versatile Resin Application - With its low viscosity, this resin is suitable for all soft, porous, and punky wood, including cedar, cypress, fir, pine, and redwood. It's also perfect for hardwoods like ipe, mahogany, maple, oak, and teak, as well as butcher block, live edge slabs, particle board, plywood, and more.
Project-Specific Epoxy - Our Penetrating Epoxy Sealer is available in various sizes: 1.5 Pint, 1.5 Quart, Half-Gallon, and Gallon. It has a simple 2 parts resin to 1 part hardener mix ratio for reliable results every time. Cleanup is easy with soap and water.

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8.8

Timbercraft

Smith's Original Clear Penetrating Epoxy Sealer™ [CPES] 2 Pint - Cold Weather Formula (CW)

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Main Highlights

PENETRATES and RESTORES Rotted Wood.
EXCELLENT Marine Grade PRIMER for Varnish and Paints.
Two Part Liquid, Formulated for EASY 5O/5O MIX.
Available in 2-Pint, 2-Quart, and 2-Gallon Sizes - and in Warm Weather (WW), and Cold Weather (CW) Formulas. [Click below for more product details.]

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8.6

Seal-Once

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.

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Main Highlights

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.

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8.3

Stone Coat Countertops

Stone Coat Woodshop Epoxy Penetrate, 1.5 Pint Kit, Low Viscosity Penetrating Epoxy for Stabilizing Soft or Rotted Wood Fibers, Superior Seal Coat for River Tables, Live Edge Slabs

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Main Highlights

Deep Penetration & Stabilization: Ultra-low viscosity formula saturates soft, rotted, or porous wood fibers, creating a stronger, more durable base for casting, laminating, or epoxy top-coating projects.
Perfect for River Tables & Slabs: Ideal for pre-sealing live edge wood slabs. Reduces bubble release and ensures smoother pours, enhancing adhesion between epoxy layers and natural wood.
Stronger Adhesion & Seal Coat: Applied before laminating or casting, this epoxy penetrate creates a superior bond, locks fibers in place, and prevents delamination for a long-lasting, professional finish.
Flexible Application Options: Can be thinned with up to 50% solvent such as acetone or denatured alcohol to achieve deeper penetration for large or porous wood projects like furniture and restoration.
Reliable Work & Cure Times: Features a 2:1 mix ratio by volume, 2530 minute pot life, and reaches gel stage in 68 hours. Apply subsequent coats while tacky or sand cured surfaces for mechanical bonding.

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8.1

MAS

MAS Epoxies Penetrating Epoxy Resin Wood Sealer, 1.5 Quart, 2-Part (1-Quart Resin and 0.5 Pint Hardener) for Countertop, Wood Stain, Rot Repair and Restoration

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Main Highlights

Wood Epoxy Solution - Our two-part epoxy system seals, hardens, preserves, and protects all types of wood, effectively stopping rot. It enhances the adherence of finishes like paint and stain, prolonging their lifespan. This easy-to-use treatment is free of VOCs and harsh fumes.
Ideal Wood Sealer - This penetrating wood sealer is the perfect dry rot treatment. As a marine-grade epoxy resin, it's ideal for wooden boat restoration, wood repairs, and woodworking projects. It reinforces and protects bare or new wood against damage.
Versatile Resin Application - With its low viscosity, this resin is suitable for all soft, porous, and punky wood, including cedar, cypress, fir, pine, and redwood. It's also perfect for hardwoods like ipe, mahogany, maple, oak, and teak, as well as butcher block, live edge slabs, particle board, plywood, and more.
Project-Specific Epoxy - Our Penetrating Epoxy Sealer is available in various sizes: 1.5 Pint, 1.5 Quart, Half-Gallon, and Gallon. It has a simple 2 parts resin to 1 part hardener mix ratio for reliable results every time. Cleanup is easy with soap and water.

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8.1

Timbercraft

Smith's Original Clear Penetrating Epoxy Sealer™ [CPES™] 2 Gallon - Warm Weather Formula (WW)

Free Shipping

Main Highlights

Penetrates and Restores Rotted Wood.
Excellent Marine Grade Primer for Varnish and Paints.
Two Part Liquid, Formulated for Easy 5O/5O Mix.
Available in 2-Pint, 2-Quart, and 2-Gallon Sizes - and in Cold Weather (CW) and Warm Weather (WW) Formulas. [Click below to see more product details.]
This is the Real, Genuine, and Original Clear Penetrating Epoxy Sealer which Still Vastly Outperforms All of its imitators!

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Our Best Overall Choice

Best Choice

9.7

TotalBoat

TotalBoat Clear Penetrating Epoxy Wood Sealer Stabilizer for Rot Repair and Restoration (1.5 Quart, Traditional)

Free Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

WOOD HARDENER FOR ROTTED WOOD: two-part epoxy system seals, hardens, preserves, and protects all types of wood by stopping rot. Makes finishes like paint and varnish stick better and last longer. Easy to use treatment has no VOCs or harsh fumes
PENETRATING WOOD SEALER: An ideal dry rot treatment; this marine-grade epoxy resin is perfect for wooden boat restoration, wood repairs, and woodworking projects. Seal bare or new wood to protect against damage
CLEAR LOW VISCOSITY RESIN WITH MANY USES: Use on all softwoods, including cedar, cypress, fir, pine and redwood. Use on all hardwoods, including ipe, mahogany, maple, oak, and teak. Use on butcher block, live edge slabs, particle board, plywood, and OSB
WOOD ROT REPAIR EPOXY AVAILABLE IN TWO FORMULAS: Choose regular formula Penetrating Epoxy for 65-90 degrees F temps; Choose Cold Weather Penetrating Epoxy for 40-65 degrees F temps (Do not use Cold Weather formula above 65 F)
CHOOSE THE RIGHT EPOXY KIT SIZE FOR YOUR PROJECT: Both formulas are available in 1.5 Pint, 1.5 Quart, 0.75 Gallon, and 1.5 Gallon sizes. Simple 2 parts resin to 1 part hardener mix ratio for reliable results every time. Easy cleanup with soap and water

Show Price

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