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

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

🌊UV-stable marine-grade protection

♻️Ultra-low VOC, eco-friendly formula

🛡️10-year water damage warranty

$253.70

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Description

🛥️ Seal your space with marine-grade confidence—because your wood deserves the best!

LONG LASTING DEFENSE - Enjoy up to a decade of water resistance on vertical surfaces—no peeling, no flaking.
ECO CONSCIOUS FORMULA - Ultra-low VOC and safe for aquatic life, so your outdoor projects stay green and clean.
MARINE GRADE DURABILITY - Shield your wood from saltwater spray and harsh UV rays with a proven marine sealant.
DEEP PENETRATION TECHNOLOGY - Seals wood fibers at the cellular level for flexible, breathable protection that ages naturally.
EFFORTLESS APPLICATION CLEANUP - Water-based formula cleans up easily with soap and water—perfect for busy pros.

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 offers UV-stable, flexible protection that penetrates wood fibers deeply, preventing water damage, rot, mold, and mildew. Safe for aquatic life and backed by a 10-year warranty on vertical surfaces, this sealer ensures your outdoor wood ages naturally with a rich silver-gray finish while maintaining structural integrity.

Specifications

ASIN	B098Z2PDR8
Base Material	Wood
Best Sellers Rank	#4,762 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #16 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 (127)
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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$253.70

Duties & taxes included

In stock

Sold byAmazon USADelivered 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 USA.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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