How to Seal Plywood for Outdoors


Sealing outdoor plywood keeps it from rotting and peeling and reduces its chances of mold and mildew. A water-resistant sealer takes only a few minutes to apply but needs to dry for several days. Plan for this drying time. Plywood is a flexible wood material with a variety of uses, from simple household projects to major construction tasks.

Things You'll Need

  • Drop cloth
  • Latex gloves
  • Rag
  • Water-resistant sealer
  • Thick-bristled paintbrush
  • Set the plywood on the drop cloth. Put on the gloves.

  • Wipe any dust from the plywood with a rag.

  • Dip the paintbrush in the sealer. Brush the sealer onto the plywood, starting with the edges and moving inward to the surface.

  • Let the treated plywood dry for three days.

Tips & Warnings

  • If you get any of the sealer on your skin, wash it off immediately.


  • Photo Credit Jupiterimages/ Images
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