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sgumedic · 04-09-2014, 00:31

I have exterior topside chain plates that going to be remounting. I really won't be able to recaulk them easily without the masts coming down so I'm interested in your thoughts on sealing them. I was thinking about using 4000 since it's supposed to be more uv resistant.

The picture is of the topsides where I removed one of the sets of chain plates. There is tape over the holes to prevent water leakage.

Click image for larger version

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Thanks!

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**Ex-Calif** · 04-09-2014, 05:04

I use 4200 but butyl tape also reportedly works well.

**HappyMdRSailor** · 04-09-2014, 05:24

Quote:

Originally Posted by Ex-Calif

I use 4200 but butyl tape also reportedly works well.

+1

I have had great results with both...

zeehag · 04-09-2014, 05:28

i use boat life as it flexes wel with boat movement. recaulk one at a time and dont loosen em all at once unless on hard.

Blue Stocking · 04-09-2014, 05:33

I am a big fan of butyl tape, but it is not good in "shear" situations. Chain plates are subject to vertical shear, and may "migrate" against the fasteners. This is one of the few cases where I would use an adhesive type, such as 4200. IMHO

woodguy · 05-09-2014, 11:23

Quote:

Originally Posted by sgumedic

I have exterior topside chain plates that going to be remounting. I really won't be able to recaulk them easily without the masts coming down so I'm interested in your thoughts on sealing them. I was thinking about using 4000 since it's supposed to be more uv resistant.

The picture is of the topsides where I removed one of the sets of chain plates. There is tape over the holes to prevent water leakage. Attachment 87655

Thanks!

Sent from my iPhone using Cruisers Sailing Forum

I use 3M 5200. Great stuff!
Woodguy

Rhapsody-NS27 · 05-09-2014, 11:28

You could get a countersink drill bit to widen the surface of the holes slightly to the shape of a funnel and use butyl. So long as there's compression, it'll fill in the extra space and won't allow water to penetrate.

**roverhi** · 05-09-2014, 11:49

Good old Life Caulk. Remains pliable and viable after more than 30 years.

Do one chain plate at a time either side. One lower shroud each side will hold up the mast while you are recaulking the chain plates. Tie off a halyard to a stanchion or something if it will increase your comfort level. Double lowers will hold up the mast while you mess with the fore and back stay.