Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 17-05-2011, 09:15   #1
Registered User

Join Date: Feb 2011
Posts: 13
Chainplates and Bedding Recommendations

I am in negotiations to purchase a 1981 Sabre 30, which has evidence of leaking deck fittings at three chainplates. I know the rigging is dynamic and deck fittings must be rebedded from time to time, but in looking at Sabre's to buy, it seems that they are particularly vulnerable to bulkhead damage. Is it nothing more than the fact that Sabre's chainplates attach to wooden bulkheads, which are easily damaged by water than fiberglass? Also, this particular owner bedded with 4200 rather than Sabre's recommended 5200 because 5200 is so difficult. What do you recommend? Is the water damage simply a measure of the type of bedding compound used or not used enough?
__________________

__________________
Bets is offline   Reply With Quote
Old 28-05-2011, 21:02   #2
Senior Cruiser
 
SkiprJohn's Avatar

Cruisers Forum Supporter

Join Date: May 2006
Location: Kea'au, Big Island, Hawaii
Boat: Cascade, Sloop, 42 - "Casual"
Posts: 14,192
Re: Chainplates and Bedding Recommendations

Aloha and welcome aboard!
Lots of theories as to why chainplates through the deck start to leak. I would not use 5200 because it does eventually get hard and if your chainplates start to work a bit they will open a crack and begin to leak. Leaving a little bit of space between the metal and the deck glass and filling with a sealer like 101 or 4200 or 4000 makes sense to me.
kind regards,
__________________

__________________
John
SkiprJohn is offline   Reply With Quote
Old 28-05-2011, 21:29   #3
Registered User
 
Butler's Avatar

Join Date: Feb 2010
Location: Los Angeles
Boat: Pearson 281
Posts: 678
Images: 18
Re: Chainplates and Bedding Recommendations

Welcome to CF!
I agree regarding the 5200. I have used polysulfide(Lifecaulk) for bedding chainplates... has worked out fine... not an adhesive but it gaskets better than the 5200.
Straightforward sort of thing to remove, inspect and rebed the chainplates as well as the bulkheads.
Can check for damage to the bulkheads without removing the plates if needs be before you commit fully to buying and you might want to sound the deck around where the chainplates go through to find out if there has been damage to the deck core.
Check out the latest edition of Casey's This Old Boat. It's a very handy book to have around anyway, particularly if you end up shopping around some more. Plenty of threads to search here for work on chainplates also.

Good luck and happy sailing!
__________________
Butler is offline   Reply With Quote
Old 29-05-2011, 03:26   #4
CF Adviser
Moderator Emeritus
 
Hud3's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: Virginia
Boat: Island Packet 380, now sold
Posts: 8,929
Images: 49
Re: Chainplates and Bedding Recommendations

I used GE SilPruf, and industrial quality silicone caulk, which was recommended by the boat manufacturer. Stays flexible and does a great job of keeping the water out.
__________________
Hud
Hud3 is offline   Reply With Quote
Old 29-05-2011, 04:30   #5
Registered User
 
vet222's Avatar

Join Date: Feb 2010
Location: Perth, Australia
Boat: Crowther, Windspeed, 33'
Posts: 20
Is the 3M 101 the same as the 3M Marine Silicone Sealant....... Thats what came up when I searched for 101 on the 3M site.
I ask this with regard to a previous entry on another thread pertaining to silicone based sealants tend to leave silicone contamination of metal and gelcoat and epoxy that make for poor adherence from any other products should the need arise to use something different.

My understanding from 3M website is that 3M marine sealant 4000 probably superior bit takes 7 - 14 days to cure whereas 4200 just 1 - 2 days for complete cure.

Comments?
__________________
vet222 is offline   Reply With Quote
Old 29-05-2011, 04:56   #6
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 17,314
Re: Chainplates and Bedding Recommendations

If the chainplate is aligned properly and the seam area is thick enough, then polyurethane will seal very well. It does not have to be 5200. Any waterproof polyurethane sealant will do the job . Bostik, Sika, 3M, (i.a.) all have adequate products. I bet other materials will be just as adequate - I have seen polysulfides used and other stuff as well.

Where the seal fails is because there is too much movement in the plate (e.g. the plate not aligned, the plate too thin, the deck not supported properly, sogging, etc..) or else when the seal is not thick enough to allow for the movement there is. You can check out in the spec sheets for each product how much movement is permitted without the bond being affected.

When we used our boat extensively, we would renew the seal every year. But I think you can renew it much less often if the boat is used less.

b.
__________________
barnakiel is offline   Reply With Quote
Old 01-06-2011, 15:14   #7
Registered User

Join Date: Feb 2011
Posts: 13
Re: Chainplates and Bedding Recommendations

Thanks to all, great advice! The surveyor found some moisture around the a couple of chainplates and at two other spots unrelated to chainplates but to the steering pedestal and on the coach roof probably related to the handrail.
__________________
Bets is offline   Reply With Quote
Old 01-06-2011, 15:48   #8
cat herder, extreme blacksheep
 
zeehag's Avatar

Cruisers Forum Supporter

Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 17,769
Images: 56
Send a message via Yahoo to zeehag Send a message via Skype™ to zeehag
Re: Chainplates and Bedding Recommendations

as for bedding ANYTHING do NOT use 5200=---is NOT a bdding compound, is a glue. use 4200. 3m makes that for bedding compoun d and works quite well. welcome.. have smooth sailing and fair winds.
__________________

zeehag is online now   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Re-Bedding Idea JusDreaming Construction, Maintenance & Refit 8 04-10-2010 18:26
Summer Bedding sandy daugherty Liveaboard's Forum 13 10-08-2010 14:20
Bedding Compound MABell Construction, Maintenance & Refit 4 08-01-2010 15:38
Best Bedding Sealant? irwinsailor Construction, Maintenance & Refit 27 12-05-2009 09:02
5200 bedding kraker Construction, Maintenance & Refit 4 25-08-2004 16:05



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 10:02.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.