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 your wood’s future with marine-grade magic!

ECO FRIENDLY FORMULA - Ultra-low VOC, water-based, non-toxic & safe for pets and plants
MARINE GRADE PROTECTION - Resists saltwater spray, mildew, mold & algae for long-lasting outdoor use
DEEP CELLULAR PENETRATION - Nanotech bonds at wood fiber level for unmatched durability
FLEXIBLE BREATHABLE SHIELD - Allows wood to expand & contract, preventing warping and cracking
EFFORTLESS APPLICATION CLEANUP - Goes on milky white, dries clear, cleans up with soap and water

SEAL-ONCE MARINE is a 1-gallon, water-based wood sealer that uses advanced nanotechnology to penetrate wood fibers at the cellular level, creating a flexible, breathable, and UV-stable barrier. Designed for high-moisture environments like docks, decks, and piers, it protects against water damage, salt spray, mold, and mildew while being eco-friendly and safe for aquatic life. Covering up to 300 sq ft, it preserves natural wood beauty without film formation and offers easy application and cleanup.

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€ 385.36

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Manufacturer	New Image Coatings, LLC
Part Number	7614
Product Dimensions	30.48 x 30.48 x 30.48 cm; 3.99 kg
Item model number	7614
Size	1 Gallon
Colour	Clear
Style	Outdoor
Finish	Liquid
Material	Water Based
Item Package Quantity	1
Coverage	300 square feet
Special Features	Water Resistant, UV Resistant, Marine Mildew Resistant
Included Components	SEAL-ONCE MARINE - 1 Gallon Penetrating Wood Sealer, Waterproofer & Stain. Water
Batteries included?	No
Batteries Required?	No
Item Weight	3.99 kg

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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