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· Telstar 28
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It depends on whether you're going to be re-using the holes or not. If you're not re-using them... then fill them with thickened epoxy, by taping the underside and then filling them with epoxy that has been thickened with fumed silica (cabo-sil).

If you're going to be re-using them, pot the holes by reaming out the core material around the holes, and then coating it with epoxy, and then filling the holes with thickened epoxy. This will protect the core from water intrusion in the future.

How long the epoxy stays workable really depends on the temperature and the type of hardener you use.
 

· Telstar 28
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Tape up the bottom of each hole, then mix up a larger batch of thickened epoxy using a slow hardener and get an empty caulking tube (west systems sells these) and fill it with the thickened epoxy, and go fill all the holes.

will not be reusing the holes , and even better I have a Shark 24, so there is no wood in the core of the deck! I am just trying to find a quick way of filling all these holes. It seems that mixing up little batches and using a syrnge would take quite a while. Yes, I know, there are no shortcuts when rebuilding a boat, but I was just hoping for a shortcut this one time!
 

· Telstar 28
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Glad to help. Use fumed silica to thicken the epoxy and keep the holes as close to flush as possible. Sanding epoxy sucks.
Yahoo! That will save me hours upon hours of work! Thanks!
 
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