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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.

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.

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.

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

🌊Waterproof protection for 300 sq ft

☀️UV-stable formula resists sun damage

♻️Ultra-low VOC, eco-friendly & safe

Description

🌟 Seal your space with marine-grade magic—because your wood deserves the best!

ALL IN ONE WOOD CARE - Seals, stains, and waterproofs in a single easy application—perfect for docks, decks, and outdoor wood surfaces.
MARINE GRADE DEFENSE - Shield your wood from saltwater spray and harsh elements with a proven UV-stable barrier.
ECO CONSCIOUS FORMULA - Ultra-low VOC and water-based for a safe, non-toxic seal that’s gentle on aquatic life and your surroundings.
EFFORTLESS MAINTENANCE - Clean up with just soap and water—no harsh chemicals needed, making your project hassle-free and pet-safe.
DEEP PENETRATION TECHNOLOGY - Fast-drying liquid penetrates wood fibers at the cellular level for long-lasting, flexible protection.

SEAL-ONCE MARINE is a 1-gallon, water-based polyurethane wood sealer designed for high-moisture outdoor environments. It offers a UV-stable, waterproof, and ultra-low VOC formula that penetrates wood fibers deeply to protect docks, decks, piers, and retaining walls from water damage and salt spray. Safe for aquatic life and easy to clean up, it covers up to 300 square feet with a clear finish that preserves natural wood color.

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
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?

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