Seal Once Marine 5 Gallon Pail

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    Seal Once Marine 5 gallon pails has the use of nanotechnology to create long-lasting, Eco-friendly wood sealers & tinted wood stains since 2005.   MARINE Premium wood sealer and dock stain is specifically formulated to provide the highest level of protection for wood structures, situated near open water.  Wood used on boat docks, decks, and retaining walls near rivers, lakes, ponds or the ocean is subjected to near constant moisture.  MARINE provides the highest level of protection in those environments.  It is a great investment to extend the useful life of wood subjected to these harsh marine conditions. Seal-Once Marine 5 gallon pails

Bronze Cedar | Natural | Coastal Gray now available in 5 gallon pails.

Marine sealer, Dock

Seal Once Marine Five gallon pails are now available

  • Save over single gallons in Bronze Cedar Marine
  • Five gallon pails now available in Marine Natural and Coastal Gray
  • Fast shipping
  • The Stain Depot is the only company to offer 5 gallon pails of Bronze Cedar
  • For single gallons click here

SEAL-ONCE MARINE Premium Waterproofing Wood Sealer & Stain is designed to protect & stabilize marine wood against water damage, salt water spray & decay.  Unlike many top-coat sealers on the market today, it penetrates wood below the surface, coating the wood fibers at the cellular level, which creates a long-lasting, flexible, breathable barrier.  It provides long-lasting protection from the inside out.

Seal Once Marine is a water-based formula

  • Available in Clear, Bronze Cedar, Natural, and Costal gray
  • Allows wood to age naturally
  • Prevents standing water
  • Lasts up to 6 years on floors
  • Seal-Once Marine five-gallon pails available
  • Save over single gallons


Great for use on:

  • Docks
  • Outdoor Furniture
  • Thermally Modified Wood
  • Swing Sets

Features of Seal Once Marine:

  • Water-based, Ultra-Low VOC
  • Eco-friendly, Non-toxic, No Odor
  • Won’t harm people, pets or plants
  • Penetrates below the surface
  • Creates flexible, breathable barrier
  • Helps resist mold, mildew & wood rot
  • Stabilizes wood from warping
  • Extends natural life of wood
  • Easy soap & water clean-up
  • Clear allows the wood to grey naturally

Find gallons as well as other Seal Once products here!

Tested by Supreme Deck Restoration. A Michigan company since 1991


Additional information

Weight 42 lbs
Dimensions N/A

Natural, Clear, Bronze Cedar, Coastal Grey