Can it be used on green treated lumber

Pressure treated lumber has to be dry.

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

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.

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.

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SEAL-ONCE Marine Ready Mix Wood Sealer and Stain, Coastal Gray, 1 Gallon

SEAL-ONCE Marine Ready Mix Wood Sealer and Stain, Coastal Gray, 1 Gallon

Product ID: 337696429

Details

Brand
Seal-Once
Color
Coastal Gray
Material
Polyurethane
Model Name
Marine
Surface Recommendation
Decks Wood

⏳Up to 10 years long-lasting shield

🌊UV-stable marine-grade protection

🛡️Waterproof & flexible wood barrier

173507CFA

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Description

🛥️ Seal your wood with confidence—marine-grade protection that lasts a decade!

NATURAL AGING ELEGANCE - Enhances wood’s natural beauty by allowing it to age gracefully into a rich coastal gray without decay or peeling.
ECO CONSCIOUS LOW VOC - Water-based, ultra-low VOC formula ensures a safer environment for your family, pets, and plants without compromising performance.
MARINE GRADE DURABILITY - Protects wood from saltwater spray, UV rays, and moisture with a scientifically formulated, aquatic-safe coating.
DEEP PENETRATION TECHNOLOGY - Seals wood fibers at the cellular level for a breathable, flexible barrier that prevents rot, mold, and mildew.
EFFORTLESS APPLICATION COVERAGE - Covers up to 250 sq. ft. per gallon with fast drying and easy soap-and-water cleanup—perfect for busy professionals.

SEAL-ONCE Marine Ready Mix Wood Sealer and Stain in Coastal Gray is a water-based, ultra-low VOC formula designed specifically for high-moisture environments like docks, decks, and piers. It creates a UV-stable, waterproof barrier that penetrates wood fibers deeply to prevent water damage, rot, and mold while allowing natural aging into a stylish silver-gray finish. Safe for aquatic life and easy to apply, it offers up to 10 years of protection on vertical surfaces and 6 years on horizontal surfaces with a single coat.

Specifications

ASIN	B098Z2PDR8
Base Material	Wood
Best Sellers Rank	#4,041 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #15 in Household Stains
Brand Name	Seal-Once
Coating Description	Water-based
Color	Coastal Gray
Compatible Material	Wood
Container Type	Jug
Coverage	covers up to 250 sq. ft. per gallon
Customer Reviews	4.2 4.2 out of 5 stars (126)
Finish Types	Penetrating
Included Components	Outdoor Stain
Item Dimensions	9 x 7 x 9 inches
Item Weight	9 pounds
Liquid Volume	1 gallons
Manufacturer	U C COATINGS
Manufacturer Part Number	SOMARINEWOOD
Material Type	Polyurethane
Model Name	Marine
Model Number	Marine
Number of Items	1
Opacity	0.5 inches
Paint Type	Water Based
Recommended Uses For Product	Protecting wood docks, decks, piers, and other wood surfaces in high-moisture areas around fresh or salt water
Size	1 Gallon
Style Name	Outdoor
Surface Recommendation	Decks, Wood
UPC	759126905156 759126569426
Unit Count	128 Fluid Ounces
Warranty Type	Time-based warranty

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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173507CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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