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  1. 28th November 2014, 03:44 PM #1
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    Default Does epoxy bond to CA?

    If I wick lots of thin CA into a crack before beginning to turn a piece of timber, then find an unexpected void deeper down, (now partly coated with thin CA), can I fill the void with (coloured) epoxy and have it bond well to the CA?

    Thanks in advance for any replies.
    ... Steve

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  3. 29th November 2014, 03:29 PM #2
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    I have found that - in general - you can. It tends to delaminate if applied to a polished surface finished with CA... but in that case there's nothing for the epoxy to key into. So long as there's a rough(ish) surface in the void - or perhaps it widens out below the surface - then it should be workable regardless of whether it's sealed with a thin CA.

    In a few worse case scenarios, such as smooth-sided grub holes I've used an awl to scratch some grooves deep into the sides to key the epoxy, but that's more a case of me playing 'better safe than sorry.'
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  4. 30th November 2014, 08:05 AM #3
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    Quote Originally Posted by Skew ChiDAMN!! View Post
    I have found that - in general - you can. It tends to delaminate if applied to a polished surface finished with CA... but in that case there's nothing for the epoxy to key into. So long as there's a rough(ish) surface in the void - or perhaps it widens out below the surface - then it should be workable regardless of whether it's sealed with a thin CA.

    In a few worse case scenarios, such as smooth-sided grub holes I've used an awl to scratch some grooves deep into the sides to key the epoxy, but that's more a case of me playing 'better safe than sorry.'
    Thanks for that reassurance, Skew. I didn't fancy trying to clean off the CA. Scratching with an awl or similar is a good idea, too.
    ... Steve

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