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Seal-OnceMARINE - 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.

Seal-OnceMARINE - 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.

Q: Can it be used on green treated lumber

Pressure treated lumber has to be dry.

Q: Can you use a regular wood stain after applying?

Yes the clear MARINE can be painted or stained. Or you can purchase a tint for SEAL-ONCE and use the MARINE as a sealer and stain. MARINE Features: • Clear formula can be painted or stained after treatment • Tinted formula provides additional UV protection • Available in 11 semi-transparent tint colors • Eco-friendly, Non-toxic; will not harm pets, plants, people or marine life • Ultra-low VOC, Water based • Can be applied around or over fresh or salt water • Flexible, breathable barrier, Stabilizes & protects wood • Prevents warping, cupping, wood rot & decay • Resistant to salt water spray • Prevents mold, mildew & algae growth • Soap and water cleanup

Q: I want to use this on a 6x6 wood beam at the opening to my walk-in shower (floor to ceiling). No direct shower spray. Will this seal it?

Yes you may use it for this specific application. As suggested in a comment down bellow, you would want to make sure that it is fully cured before using the shower. Typically it would take 48 hours to cure but it may take longer depending on the environment.

Q: does this work for the interior of a sauna , safe to sit on?

It dries to a hard, smooth finish, is non toxic and nice to look at. Would be safe to sit on...other types of recreation may require caution.

4.3/5

Product ID: 12191199

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Details

Material
Polyurethane
Brand
Seal-Once
Style
Outdoor
Item Weight
8.8 Pounds
Item dimensions L x W x H
12 x 12 x 12

🌿Ultra-low VOC, eco-safe

💧Waterproof barrier

☀️UV-stable protection

Description

🌊 Seal your wood’s future—waterproof, eco-smart, and built to last!

ECO FRIENDLY SAFE - Water-based, ultra-low VOC formula that’s non-toxic to aquatic life and pets.
BROAD COVERAGE POWER - One gallon covers up to 300 sq ft, perfect for docks, decks, and retaining walls.
ULTIMATE MARINE DEFENSE - Penetrates deep to shield wood from saltwater and moisture damage.
FAST DRYING EASY CLEANUP - Dries quickly and cleans up effortlessly with just soap and water.
LONG LASTING NATURAL FINISH - Preserves wood’s natural color with a flexible, breathable, and UV-stable coating.

Seal-Once MARINE is a 1-gallon, water-based penetrating wood sealer designed for high-moisture outdoor environments like docks and decks. Its ultra-low VOC, polyurethane formula creates a UV-stable, waterproof barrier that protects wood fibers at the cellular level while being safe for aquatic life. Covering up to 300 square feet, it dries fast and cleans up easily, extending the life and natural beauty of your wood surfaces.

Specifications

Material	Polyurethane
Brand	Seal-Once
Style	Outdoor
Item Weight	8.8 Pounds
Item dimensions L x W x H	12 x 12 x 12 inches
Compatible Material	Wood
Water Resistance Level	Waterproof
Item Form	Liquid
UPC	850336001024
Unit Count	128.0 Fluid Ounces
Number of Items	1
Color	Clear
Surface Recommendation	Walls,Wood
Manufacturer	New Image Coatings, LLC
Part Number	7614
Item Weight	8.8 pounds
Product Dimensions	12 x 12 x 12 inches
Item model number	7614
Is Discontinued By Manufacturer	No
Size	1 Gallon
Finish	Liquid
Item Package Quantity	1
Coverage	300 square feet
Included Components	SEAL-ONCE MARINE - 1 Gallon Penetrating Wood Sealer, Waterproofer & Stain. Water
Batteries Included?	No
Batteries Required?	No

Have a Question? See What Others Asked

Can it be used on green treated lumber

Can you use a regular wood stain after applying?

I want to use this on a 6x6 wood beam at the opening to my walk-in shower (floor to ceiling). No direct shower spray. Will this seal it?

does this work for the interior of a sauna , safe to sit on?

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago