How to: Wood End Grain Sealer

Written by wade shaddy
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How to: Wood End Grain Sealer
Apply end grain sealer liberally to bulk units of lumber. (lumber image by JJAVA from

End grain is the terminating point of pores in the wood, an open doorway for moisture. End grain sealer is a specially formulated product that enters the wood through the pores where it hardens to form a barrier against moisture osmosis. Take a few minutes to protect your wood by applying wood grain sealer. It's easy to do with a brush, and pays off in the long run by making the lumber more stable and less prone to warping.

Skill level:

Things you need

  • End grain sealer
  • Brush
  • Dust sheet

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  1. 1

    Stack the lumber to be sealed with the ends flush with each other. Place a dust sheet underneath the lumber to protect the surface below from drips.

  2. 2

    Dip the brush into the sealer. Liberally apply the sealer to both ends of the lumber. Wait 30 minutes for the sealer to soak in.

  3. 3

    Apply another coat of sealer to the lumber with the brush.

  1. 1

    Lay doors out flat on sawhorses. Liberally brush sealer on to the top and bottom end of the door. Wait 30 minutes and reapply.

  2. 2

    Tip china cabinets, free standing cabinets or any woodworking project that is not yet installed, on its back.

  3. 3

    Brush sealer onto any end grain pieces of wood on the top or bottom. Let it dry and soak in for 30 minutes and reapply. Let it dry for 30 minutes. The item can be stood back up.

Tips and warnings

  • For large projects such as lumber in decking, bunks or units, you can apply end grain sealer with any air or airless spray gun using a large bore paint tip on the spray gun. Liberally coat any and all end grain.
  • Don't worry if the end grain sealer overlaps the face grain. It will do no harm. This is actually recommended on large units of lumber.

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