Reply by LesB

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Posted on Sealing MDF Router Table Insert

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2089 posts in 3827 days

#1 posted 04-28-2018 07:09 PM

I would treat them with some sort of sealer. The MDF is relatively soft and adding a hard finish to those cut out surfaces can only make them stronger and more durable; at least it did mine. I would also seal the bottom although you don’t particularly have seasonally changing humidity problem in most of Calif. I use a top layer of 3/4” MDF on my work benches and I seal them with poly to make it more durable and resistant to glue and other spills. Shellac, poly, or lacquer will all work so use what you may have.

-- Les B, Oregon

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