What is the best way to repair cracks in the gel coat - Page 3 - SailNet Community

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  #21  
Old 09-25-2007
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Deck Gel Coat Cracks Question

A moisture meter shows moisture in my deckd where there are cracks in the gel coat. Can I just drill some holes and fill with Creeping Crack Filler or Git Rot? Seems to me that it will stop the rot and strenthen the deck. The stuff is premixed and ready to go. - Capt. Ron
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  #22  
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Can I just fill the deck cracks with Creeping Crack Filler or Git Rot? Should strengthen the deck and eliminate the rot from moisture intrusion. What do you experts out there think? A moisture meter shows moisture in the deck at the location where the cracks recently appeared.
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Old 09-25-2007
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I have an area where I have to do the same repair.

The book I am using (Practical Sailor volume on maintenance and repair) recommends drilling in a pattern (I will have to check spacing later) and then letting it air dry (possibly with heat) for some time before filling it with thickened epoxy. You drill through the top skin and core but not the bottom. Then you have to refinish the deck. I am considering coming up from the bottom and epoxying in plugs in my holes and then adding some glass on the underside (cabin roof) after drying. I can seal with epoxy on top and then paint. But that is not what the book says to do and I could end up regretting it.
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Old 09-25-2007
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You really need to repair whatever is causing the deck's gelcoat to crack and re-inforce it before doing anything else. Creeping Crack Filler and Git Rot will not do that. They'll probably not help much with preventing future water intrusion either.
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Originally Posted by rarelyontime View Post
Can I just fill the deck cracks with Creeping Crack Filler or Git Rot? Should strengthen the deck and eliminate the rot from moisture intrusion. What do you experts out there think? A moisture meter shows moisture in the deck at the location where the cracks recently appeared.
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Old 09-25-2007
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In my case, the cracks appear to be from an impact and once sealed I don't think moisture will come in there again. There are a couple of places where I have cracks but I am not sure I have moisture; I am assuming that sealing the top will be adequate there, but I will drill a hole just to get a sample from the bottom and plug it. If the sample is moist, I will drill more, dry and then plug. Soft spots would require a different approach.
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Old 09-27-2007
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I did have crazing (not stress cracks) throughout my deck gelcoat.
I was able to re-gelcoat, but it wasn't easy.
First, I sanded the surface,
Then I brushed on a relatively thick layer of gelcoat.
Then I block sanded the gelcoat to get it flat. This would sand most of the new gelcoat off, but filled the crazing.
Then I sprayed several coats of gelcoat.
A light sanding with 400 and 600 grit flattened the orange peel.
Compound, wax, done.
I didn't want to paint, as a similar amount of labor for paint or gelcoat results in a shorter life for painted surfaces vs. gelcoat. Gelcoat is easier to repair also.
For more detail, email me.
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Old 09-28-2007
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has anybody heard of/tried this?

i have a couple of spots on my deck and came across this site..not sure if it's any good or not..
anybody seen this stuff?
http://www.epoxyproducts.com/capt.html

thanks,
sam
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Old 09-28-2007
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Quote:
Originally Posted by sanctuarysam View Post
i have a couple of spots on my deck and came across this site..not sure if it's any good or not..
anybody seen this stuff?
http://www.epoxyproducts.com/capt.html

thanks,
sam
I have used it, frankly it didn't work too well.
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Old 09-28-2007
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ummmm
catalinadirect has a kit for the stanchions
http://www.catalinadirect.com/index....&Product_ID=30

might just as well do the chainplates too
http://www.catalinadirect.com/index....&Product_ID=12
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Old 10-17-2007
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I had a couple of scratches in the gel on my boat, and since I had a chunk of 'miracle cloth' (metal polishing primarily, but said it was good on fiberglass so what the heck) in my hand I rubbed at them.
Long story short, they went away, the chemicals in the cloth compounded the surface, filled the scratch, and polished the area to where I can neither see nor feel where the problem was.
Mind you, this wasn't crazing or cracking, just a scratch.
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