Bedding Deck Hardware With Butyl Tape - Page 15 - SailNet Community
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post #141 of 414 Old 10-16-2011
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Chainplates

I'm rebedding everything on my Tartan 27 as part of a total restoration of the deck, including partial recore. The area around my chainplates was recored. I isolated the area directly around the plates with thickened epoxy to form a block to protect the new core.

I'm thinking about how to re seal the chainplates. My T27 chainplates emerge through the deck without a plate screwed to the deck. If I use butyl tape, do I need a plate to form mechanical pressure?

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post #142 of 414 Old 10-16-2011
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Butyl does need to be in compression to be effective.

A good idea would be to form a glass riser where the chainplate emerges through the deck - it will avoid water pooling around the chainplate. You can put a plate on if you wish. The link below explains - scroll down a bit.

Maintenance Log for Syzygy
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G4Z1011.jpg  

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post #143 of 414 Old 10-17-2011
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Thanks for the help. The Tartan has an elevated section where the chainplates emerge already.

Nice link.

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post #144 of 414 Old 10-17-2011
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Quote:
Originally Posted by mitiempo View Post
Butyl does need to be in compression to be effective.

A good idea would be to form a glass riser where the chainplate emerges through the deck - it will avoid water pooling around the chainplate. You can put a plate on if you wish. The link below explains - scroll down a bit.

Maintenance Log for Syzygy
Without a plate added to the design of the picture above do you think it will hold well. Seems like the space around the chain plate filled with butyl will get embedded with dirt.
Also without the plate where is the compression coming from?
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post #145 of 414 Old 10-17-2011
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David

I guess you didn't go to the link I provided. Here are 2 later pictures.
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G4Z09981.jpg   G4Z1131.jpg  

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post #146 of 414 Old 10-17-2011
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You are right I didn't follow the link.
Glad I did this time. A lot of great pictures. Thanks!

What confused me was the comment that the plate could be added if he wished.
It looks like it is pretty much required if butyl is to work properly.

Do you agree or am I reading too much into it?
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David

I think you could add a plate without the raised portion and it would work well. The pics show the same thing I did as it avoids the chainplate exit sitting in a puddle. It lessens the chance of a leak even further.

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post #148 of 414 Old 10-18-2011
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Sounds good.
The plates on some boats I've seen were just stamped sheet metal. The ones in the picture looked like solid stainless.
Were they made with official machine shop tools, milling machine etc or do you have some way to make them with lower end tools?
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My plates are thicker as well. Any shop that works with stainless can cut them out for you. Stainless isn't that hard to drill but machining a slot is beyond basic tools.

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Quote:
Originally Posted by mitiempo View Post
My plates are thicker as well. Any shop that works with stainless can cut them out for you. Stainless isn't that hard to drill but machining a slot is beyond basic tools.
That's what I thought.
Just wanted to make sure I wasn't missing some cool home-brew trick.
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