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I have a couple of live edge slabs I was planning on making into live edge end tables but I'm wondering what to do with the cracks in the side - if anything can be done at all. Could I fill them with a glue/sawdust mixture? Would some other commercial product be better? Is it worth attempting at all?

Here are pictures of the cracks: Live edge slab

Live edge slab

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  • What did you end up doing? Could you post pictures?
    – John Cast
    Nov 22 '17 at 5:23
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Could I fill them with a glue/sawdust mixture?

You can yes but common woodworking glue (PVA-type, white or yellow) wouldn't necessarily be the best choice for the glue.

A much more solid fill can be made by using epoxy. Filled (or just coloured) epoxy is now a common material for filling voids and defects in wood. To a degree this kind of filler can stabilise a crack and add strength, but without some further means to hold the wood steady (e.g. a butterfly key, hidden bolt or dowelling) a crack may continue to open up, so it is worth taking at least one extra step as a safety measure.

Further reading in some previous Q&As:
filling cracks in tables
Large hole filler products, what is available
Filling gaps/seams in a new cherry tabletop

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Seconding the suggestion to use epoxy. That crack is an interesting one though because it goes through the nonflat surface of the live edge, so its a bit challenging to make a mould to stop the epoxy from leaking out.

Epoxy pouring jig

My suggestion would be to build a mould that holds the slab on its side (with the live edge on the top), and pour the epoxy in from the live edge. I did a live edge slab project recently and built a somewhat similar jig for that purpose. In your case since the gaps are bigger I think it would be worth using a proper melamine mould (with vices holding it into the slab) to seal the crack on the flat faces.

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  • Welcome to WSE. Please do not provide links, insert photos instead.
    – Ashlar
    Feb 22 at 2:06
  • Thanks, I've added an image. Feb 23 at 0:43

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