How to Seal Marine Ply with West System Epoxy

Written by c.l. rease
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How to Seal Marine Ply with West System Epoxy
(Hemera Technologies/ Images)

Marine plywood deals with harsh weather environments better than other types of treated plywood. Although strong, marine plywood will succumb to the constant moisture and rot. Applying a West System epoxy coating to the plywood after installation will keep moisture from contacting the plywood. A solid epoxy coating is required to fully protect and extend the life on the marine plywood installed in your boat or a structure located in moist environments.

Skill level:

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Things you need

  • Solvent
  • Clean rag
  • 80-grit sandpaper
  • Hair dryer
  • Paint roller pan
  • Foam roller cover
  • Roller handle
  • Foam roller brush

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  1. 1

    Pour solvent on a clean rag. Wipe the surface of the marine plywood with the dampened rag to remove contaminants from the wood.

  2. 2

    Sand the surface of the cleaned plywood with 80-grit sandpaper. Wipe the plywood a second time with the solvent-dampened rag. Dry the plywood with a hairdryer.

  3. 3

    Slide a foam roller cover onto a roller handle.

  4. 4

    Mix the amount of West System resin and hardener in a paint roller pan that you can apply to the plywood before it hardens.

  5. 5

    Roll the foam roller cover in the mixed epoxy. Roll the epoxy onto the surface of the marine plywood, working the epoxy in a 24-inch-square area.

  6. 6

    Remove the roller marks from the epoxy by dragging a foam roller brush in a long straight line across the tacky epoxy.

  7. 7

    Repeat the process to coat the entire surface of the plywood with epoxy.

Tips and warnings

  • Be sure to coat the marine plywood in a well-ventilated area.

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