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Go Back   SailNet Community > On Board > Gear & Maintenance > Hole in hull
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Thread: Hole in hull Reply to Thread
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Topic Review (Newest First)
08-22-2012 07:35 AM
jfl14609
Re: Hole in hull

it was a small drill they used to allow the boat to drain if any water got in over the winter trust me if that much water got in there (the hole was not well placed) i think you have bigger issues. the hole has never been filled
08-22-2012 07:32 AM
Trinidoc
Re: Hole in hull

How did you get your hole? Was it a drill hole that was filled?
08-22-2012 07:27 AM
jfl14609
Re: Hole in hull

i think the holes you have are a bit larger than mine is I say 1/4 in but realistically its prob 1/8 i would say a bb would barely fit in it. my original plan before asking people that knew what they were doing was to mix some resin and hardener up then roll up a tiny amount of fiberglass to fit in the hole. then soak it in the resin and stuff it in the hole. seems like others may have better ideas though
08-21-2012 09:20 PM
Trinidoc
Re: Hole in hull

I'm glad this has come up as I have some holes from old seacocks to fill. The old ones had 4 holes and the new ones have 3. My holes are already bevelled from the bolt heads so i think i will use the 105 epoxy mixed with 406 silica to thicken it and some small pieces of fibreglass thrown in for strength. I have to fill my holes from the outside.
08-21-2012 09:00 PM
jfl14609 So much for 5 mins haha I would have to assume this would be more permanent the just pulling the floor board and filling the hole with epoxy
08-21-2012 08:48 PM
sww914
Re: Hole in hull

If I had to go buy one or the other today I would buy cab-o-sil, but if I already had the 407 I would just use it and put 2 layers of glass over it and call it done.
08-21-2012 08:41 PM
jfl14609 Would 407 be a ok sub for cab soil as I already have some
08-21-2012 08:33 PM
sww914
Re: Hole in hull

Definitely makes a difference. There's no way I would splash the boat without glassing over the patch like I detailed in the 2nd description.
08-21-2012 08:22 PM
jfl14609 This hole is below the water line approx 6 inches above the keel on a cs 27. Not sure if it makes a difference
08-21-2012 07:57 PM
sww914
Re: Hole in hull

I did about 50 of these on my boat.
From the outside, countersink the hole a little bit. Sand it smooth with 80-120 grit. Clean with lacquer thinner or acetone on a new rag. Mix up some epoxy thickened with cab-o-sil (or mix some Marine Tex) until it's a thick paste.
Fill the hole well, smashing it deep into the hole. Smear it flat, very flat, with your spreader. At this point you can leave it or sand it smoother and leave it, or you can sand and primer and paint or use gelcoat, it all depends on how good you want it to look.
If it's at or near the waterline, I sanded the repair down as deep as a layer of impregnated fiberglass cloth is thick (about 1mm for 8oz glass) out to about 3" in diameter and then I layed-up a layer of glass over the plug to be certain that it would never leak or fall out.
In reality, I spent about 5 minutes per hole but I was doing quite a few at once.
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