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How You Can Make Knot Holes & Voids Vanish

So I was making my coffee table and once the top was glued together, I sanded it down flat.

It was at that point I could really see it. I could tell I didn’t choose the best lumber at lowes for this project.

There were voids and knot holes everywhere!

Ok, to be honest, I knew this was going to happen, and I chose the wood just so I could apply this method to fix it, and teach you exactly what the process is.

What method am I talking about?… Epoxy!

So I got some Gorilla Glue brand epoxy, which seems to be well made and easy to use.

Epoxy is a 2-part glue that bonds to almost everything. The gorilla glue epoxy comes in a dual-syringe that applies both parts equally and simultaneously. Very helpful.

So you mix it up and use a little piece of wood to apply it. Wherever it sets, it will cure and is NOT easy to sand away, so you don’t want to over do it.

For that reason, you limit the exposure it has on the surface by basically quarantining the voids with some masking tape.

Here’s what I mean:

See the void from the knot hole? I surrounded it with tape and I’ll apply the epoxy just where I want it.

Here’s the entire table top, taped up and ready for epoxy:

Next you want to apply the epoxy, like I mentioned above, just dab it on with a little piece of wood once you’ve got it mixed.

Here’s what it will look like when applied:

Once it sets you can sand it down with a orbital sander and you’ll have a nice flat surface:

Here’s another before and after. This is when the epoxy was hard and I removed the tape:

And here’s the same knot after sanding down the epoxy:


Now what I expected to happen was for the epoxy-filled voids to completely resist the stain I would apply to the surface.

That’s another reason I tried to keep the epoxy in really focused areas using the masking tape.

But the epoxy actually darkened up with the stain really nicely, and by the time it was dry, you couldn’t even tell where the epoxy was.

Here’s the entire process on this one knot hole:

So as you can see, epoxy does a really good job of filling in voids and knot holes to leave your surfaces smooth and flat.

And the process is super simple, so give it a shot and let me know what you think!

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4 thoughts on “How You Can Make Knot Holes & Voids Vanish”

  1. This convenient two-part wood epoxy putty has a multitude of uses. While it is ideal for filling unsightly nail, screw and knot holes in wood as well as repairing damaged areas (scratches, gouges, dry rot, etc.), where it really shines is as an excellent shapeable putty for carvers.

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