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Chainplate Rebed Tricks

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C25Guy
1st Mate

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USA
37 Posts

Initially Posted - 03/23/2007 : 20:22:06

Can we revisit chainplate sealing for those of us that haven't done it before? I've got all the parts removed and have picked out most of the old sealant from all six places. Is there a trick that anyone uses to get the slots and holes really clean? I was thinking of a little brass brush soaked in acetone for the uppers. Looks like I could get a normal toothbrush in the holes for the lowers. How clean should/can they be?

One of the lowers and both uppers were pretty moist inside the deck. I've read about using acetone to dry this stuff out. Exactly how is this done? I could use soaked brushes for the slots for the uppers as mentioned above. Does anyone duct tape over the bottom holes of the lowers and then fill the hole with acetone? Would that help any?

Alan
"Maggie Mae"
C-25 #2815 SR/SK

Edited by - C25Guy on 03/23/2007 20:23:00

Leon Sisson
Master Marine Consultant

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USA
1893 Posts

Response Posted - 03/24/2007 : 12:23:26

Alan,

For drying out deck core, I suggest heat and patience. Maybe a 100w lightbulb from below, but not close enough to the fiberglass to cause heat damage (or start a fire). I'd try to not let the fiberglass get too hot to touch.

I wouldn't worry about removing every last molecule of water. I seem to recall a moisture content around 10% to 15% is normal and not harmful. I'd concentrate on getting the wood right at the holes really dry. I believe moisture further back in the core will slowly redistribute evenly by migrating along the wood fibers. Once the ingress of new water is prevented, I would expect the core to slowly dry out on its own. It's my impression the plywood deck core in a C-25 is not totally encapsulated, and so can breath a bit in the gap between the deck and liner.

Once the chainplate holes are dry, I think it would be a real good idea to seal the core against future water intrusion. There are several posts in the archives here detailing the various methods others have used successfully ("[url="http://www.catalina-capri-25s.org/forum/topic.asp?TOPIC_ID=12998"]Plugging leaks in Gudgeon Through-bolt holes[/url]" for instance). Most of the techniques have in common sealing off the core from the hole with epoxy resin, and bedding the chainplates with polysulfide sealant.

-- Leon S

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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.