Question about epoxy wood filler

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Forum topic by Chris Cook posted 11-18-2016 11:57 PM 1128 views 0 times favorited 3 replies Add to Favorites Watch
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Chris Cook

326 posts in 2425 days

11-18-2016 11:57 PM

Topic tags/keywords: walnut

Hey all and happy Friday!

I am about to take a big piece of live-edge walnut and make two floating shelves. It is a Christmas present for my new daughter-in-law. One part of the wood piece has a big split about 6 inches long. Many many years ago (More than 30) in a woodworking class, we made cypress clocks and used. what I thought was, an epoxy wood filler. It was a two part mix that resulted in a black epoxy like substance. We put this down into the splits to prevent the splits from ‘growing’. It was sandable and worked great.

I have found stuff like:

‘PC Products 163337 Woody Epoxy Paste’ link

‘WoodEpox Wood Replacement Compound 2 Pint Kit’ link

The important part of this is that it must not just fill the space, it must also bond and hold this split from migrating. So I am looking for more than a filler.

See pictures and I appreciate your time! (the bigger split in picture 2 is irrelevant as I am cutting along that split)

-- Chris, "all we are is sawdust in the dust collector""

3 replies so far

View jerryminer's profile


944 posts in 1585 days

#1 posted 11-19-2016 01:37 AM

Hi Chris—-

What you have there is not a “live edge slab” but a “cookie”—- a cross-grain slice from a tree. Such a piece is very prone to splitting, as the wood at the rim tends to shrink more than the wood at the center.

You can fill the existing split with epoxy, and it might stay stable——but it might not. If it still has a relatively high moisture content (do you have a moisture meter?) then it will continue to shrink and crack. You will not stop it with epoxy—-although you may make the cracking appear in a different place in the piece.

Achieving and maintaining “equilibrium moisture content” (EMC) is what will keep this cookie stable.

Once you get to EMC, then WEST system or System Three epoxies are both good sources for quality epoxies.

-- Jerry, making sawdust professionally since 1976

View Chris Cook's profile

Chris Cook

326 posts in 2425 days

#2 posted 11-19-2016 02:55 AM

Thanks for your reply. What I plan to do is cut this along the big split so that I have a large and small shelf piece. My hope is that cutting this will relieve the conflicting forces that make these split so much.

I will look at the WEST system and System Three epoxies

thanks again!

-- Chris, "all we are is sawdust in the dust collector""

View mahdee's profile


3991 posts in 1911 days

#3 posted 11-19-2016 02:56 PM

If you have more of these cookies, you can cut a wedge and insert it into the crack. Butterfly is another option. Epoxy should do it too; I doubt that thing will crack any further.


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