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Old 08-21-2012
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Hole in hull

I have a small hole in my hull (previous owner thought it would be a nice drain in case water got into the boat) its about 1/4 in the size of a bb. whats the easiest permanent repair. i thought about marine tex but it looks to easy and normally things that work arent that easy
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Old 08-21-2012
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Re: Hole in hull

I think Marine Tex is a putty; I'm not sure if that is best.

I would:

1. Rough up the walls of the hole with a wood file or coarse sandpaper wrapped around a dowel; clean up the dust;

2. Put some duct tape at the bottom of the hole from the outside;

3. Pour some good epoxy in the hole from the inside;

4. Once the epoxy cures, fair it out and paint/seal it;

A 1/4" hole isn't going to be a structural issue; just fill it.
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Re: Hole in hull

any way to do it from the outside the inside is under a teak floor
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Old 08-21-2012
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Re: Hole in hull

Take the time and pull up the floors its just a hand full of screws and then you have acess. Do the job right the first time and all will be well, no sinky boat
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Re: Hole in hull

Would you recommend any fillers I think i have some west system 407 or I could even cut up some fiberglass and put it in the hole
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Old 08-21-2012
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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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This hole is below the water line approx 6 inches above the keel on a cs 27. Not sure if it makes a difference
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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.
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Would 407 be a ok sub for cab soil as I already have some
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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.
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