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Old 01-04-2016, 13:55   #1
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Boat: Cheoy Lee 32 Offshore, 1979 (Ray Richards)
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Yellowing

Please---

Does 5200 or 4200 yellow with age?

I am considering using one of these to fix a problem where my hull contacts the deckrail-- please see picture. The gelcoat is chipping off at this contact.

Any others have this issue-- ???
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Old 01-04-2016, 15:55   #2
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Re: Yellowing

Folie,

I am sorry to write this because I think you'll feel bad about it, but it looks to me as if you've got water intrusion under at least the forwardmost screw holding that chock on, and quite possibly, the aftmost one, too. You'll need to remove it and discover what's going on under it. You may have some rotten timber to remove, too.

There are people here on CF who can talk you through it, if there's no shipwright in your area who understands timber.

Anyhow, after you've discovered what's happening with your hull to deck joint*, then 5200 (which turns slightly pink) or 4000 are both excellent sealants, but the 5200 is the stronger glue, which should not be used if it's something you will want to remove.

* Now is the time to see if the water intrusion has come below, as well. A friend with a Cheoy Lee similar to yours, it had come in and damaged the attachments of the bulkheads to the deck, and repair was a big job. So it really needs a thoughtful evaluation.

Good luck with it.

Ann
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Old 01-04-2016, 21:44   #3
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Re: Yellowing

Use 4000UV if you don't want yellowing.
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Old 02-04-2016, 10:53   #4
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Re: Yellowing

To Ann---

My 'chipping off' problem isn't just at that chock you noticed-- it is pretty much along the entire length of this hull to deck rail contact. I planned to cover this entire contact-- along the entire length of Folie.

My other thought was a "rub-rail".
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Old 02-04-2016, 16:46   #5
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Re: Yellowing

G'Day Folie,

I'm a bit unsure of what you are proposing to do with the sealant. Are you thinking of removing the toe rail and sealing under it, or are you talking about using the sealant over the cracked areas, or what??

Jim
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Old 02-04-2016, 22:58   #6
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Re: Yellowing

Have had very poor luck trying to stop a hull/deck leak by butting sealant up against a cap rail or whatever. The sealant bond with the wood soon breaks down and the leak returns. If the cause of the leak is a fastener better to pull the fastener and caulk with LifeCalk, 4200, or whatever. At least that you will have some chance of stopping the leak long term. If the leak is the hull to deck joint, a real repair is way more drastic. You may get by with pulling the cap rail and caulking the crap out of it hopefully sealing the leak when you bolt the caprail back down. Some people have gone so far as to separate the hull and deck and recaulk with 5200 or other strong bonding agent. I glassed in the hull to deck joint on my boat but had other reasons as well as leaks for doing that.
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