Seal Once

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seal once nano poly

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Anchorseal wax based sealer

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Seal Once Marine has been leading the innovation in the use of nanotechnology to create long-lasting eco-friendly sealers and stain.

Seal Once MARINE Premium wood sealer and dock stain is specifically formulated to provide the highest level of protection for wood near open water.

Where to use

  • Boat docks over water
  • wood decks
  • retaining walls near rivers and lakes
  • Wood near the salt water ocean
  • Great investment to extend the life of wood subjected marine conditions.

Bronze Cedar top color

Premium Waterproofing Wood Sealer & Stain is designed to protect & stabilize marine wood against water damage, salt water spray & decay.

Seal Once Nano Poly water based stain

  • Penetrates wood below the surface
  • Coats the wood fibers at the cellular level,
  • Long-lasting and flexible
  • Creates a breathable barrier

Seal-Once Marine clear is odorless

Clear formula allows wood to age naturally without decay. Overall, weathers  to a rich silver-gray over time. Tinted Seal-Once Marine will give added UV protection. Generally the product goes on milky white and dries clear or to color

Nano Poly colors:

  • Black
  • Mahogany
  • Cedar
  • Redwood
  • Bronze Cedar
  • Coastal Gray
  • Clear


  • 250 sq ft per gallon on older treated wood
  • 400 sq ft per gallon on IPE and hardwoods

How long does Seal Once Marine last?

  • 10 years on vertical surfaces
  • Generally up to 6 years on horizontal surfaces
  • Can be rolled, brushed or sprayed

Eco Friendly stain

  • Odorless
  • Non-Toxic
  • Prevents standing water for 10 years
  • Stain can be tinted
  • Seal Once is a low VOC stain
  • Can be shipped anywhere

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