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Fixing Pin Holes in Carbon

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Created by Gorgo > 9 months ago, 18 Jan 2020
Gorgo
VIC, 4911 posts
18 Jan 2020 12:04PM
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Water and salt crystals form in a couple of spots on one of my carbon foils, usually after sitting in the hot car, I heated the foil and can isee two main spots. I can see one of the voids with a microscope. The other is invisible.

I can repair the visible one easily enough. The other I am hesitant to start digging around and making bigger holes, and I suspect once I fix the known holes, other ones will appear.

I have two questions.

Can you suggest any techniques to get the epoxy deeper inside the voids so that I get a decent seal. I don't want to just rub resin on the top. I am thinking vacuum, and maybe heat and cold.

Can you suggest any coatings (paint or primer) that would seal the microscopic holes?

I am talking about maintenance tasks. I want relatively simple repair solutions, The foil works perfectly well as it is. I don't want to have to completely strip it back or do a major job on it. I think doing too much to it would do more harm than good.

Subsonic
WA, 2964 posts
18 Jan 2020 10:27AM
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If you want to get some resin in there, buy a blunt needle/syringe from a medical shop, then drill in minimal amount and syringe in the resin.

heating it up (the foil) then applying the resin/paint whilst its cooling is also an alternative you can try if you don't want to drill holes/or they're too small to bother drilling. Its a bit hit and miss whether it actually works, but at worst you've only wasted a small amount of resin.

decrepit
WA, 11829 posts
18 Jan 2020 11:43AM
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On my boards I just use spray putty, that instantly shows up pin holes because there's convex meniscus around them with a black dot in the middle. You can either use a fine needle to work the paint into the holes, or drag a squeegee over them to force the paint down. But you can only do small areas at a time before the paint gets to thick.

harry potter
VIC, 2777 posts
18 Jan 2020 5:40PM
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Have you tried the glazing compound


www.seabreeze.com.au/forums/Kitesurfing/Foiling/High-Speed-Foil-Prep



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"Fixing Pin Holes in Carbon" started by Gorgo