Bedding Deck Hardware With Butyl Tape - Page 30 - SailNet Community
 50Likes
Reply
 
LinkBack Thread Tools
post #291 of 398 Old 11-03-2013
midlife crisis member
 
AllThumbs's Avatar
 
Join Date: Jul 2008
Posts: 975
Thanks: 0
Thanked 10 Times in 8 Posts
Rep Power: 8
 
Re: Bedding Deck Hardware With Butyl Tape

Is the transom cored?

I sail.
AllThumbs is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #292 of 398 Old 11-14-2013
Junior Member
 
Join Date: Feb 2013
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Bedding Deck Hardware With Butyl Tape

For replacing external chainplates attached to the side of the hull, the manufacturer recommends 3M4000 for UV protection. I was thinking that butyl tape would be better. Thoughts? Mosaic, Friday Harbor, WA
Mosaic is offline  
Quote Quick Reply Share with Facebook
post #293 of 398 Old 11-14-2013
Senior Member
 
asdf38's Avatar
 
Join Date: Jul 2010
Posts: 778
Thanks: 1
Thanked 12 Times in 11 Posts
Rep Power: 6
 
Re: Bedding Deck Hardware With Butyl Tape

Quote:
Originally Posted by Mosaic View Post
For replacing external chainplates attached to the side of the hull, the manufacturer recommends 3M4000 for UV protection. I was thinking that butyl tape would be better. Thoughts? Mosaic, Friday Harbor, WA
If the plates are bolted externally what are you sealing from? Just the bolt holes? I don't see the UV exposure. If so then I would put butyl under the chain plates around the holes and under the head of the bolts.

As far as Butyl and UV I'd like an answer too. I bedded my chainplates in butyl last season (through the deck) but was hesitant about letting butyl be exposed to UV dirt etc, so I put a layer of lifecaulk over that. I'm not sure this was smart because the lifecaulk has turned yellow.
asdf38 is offline  
Quote Quick Reply Share with Facebook
post #294 of 398 Old 12-04-2013
Member
 
Join Date: Jun 2010
Posts: 75
Thanks: 2
Thanked 2 Times in 2 Posts
Rep Power: 6
 
Re: Bedding Deck Hardware With Butyl Tape

This is a very informative and extensive discussion. After reading the instructions and comments over the past fiew months I am ready to do some work on my boat this winter/spring. I am curious if anyone compared the efficacy of the butyl tape with that of 3M 4200 or other marine materials using the exact techniques for rebedding described in this post. After countersinking the holes, cleaning the surfaces, tightening the nuts without bolt rotation, since it seems the whole process is so technique dependant, shouldn't both products work equally well? A concern of mine is that since butyl tape continue to be so pliable it will continue to flow when exposed to heat during the summer and the additional tightenings may result in accidental rotation of the bolt. Has anyone considered using spacers under deck hardware to facilitate a more even distribution of the material and prevent overtightening?
endoit is offline  
Quote Quick Reply Share with Facebook
post #295 of 398 Old 12-04-2013
Chastened
 
BubbleheadMd's Avatar
 
Join Date: Nov 2009
Location: Edgewater/Annapolis
Posts: 3,393
Thanks: 2
Thanked 82 Times in 77 Posts
Rep Power: 6
 
Send a message via Yahoo to BubbleheadMd
Re: Bedding Deck Hardware With Butyl Tape

Butyl has more stretch.
When a deck fitting moves, (and they all will eventually) the butyl maintains the seal where the 3M products have dried up, and allow the seal to be broken.

S/V Old Shoes
1973 Pearson 30 #255
BubbleheadMd is online now  
Quote Quick Reply Share with Facebook
post #296 of 398 Old 12-04-2013
Senior Member
 
mitiempo's Avatar
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,512
Thanks: 0
Thanked 96 Times in 87 Posts
Rep Power: 8
   
Re: Bedding Deck Hardware With Butyl Tape

Spacers are not necessary. The butyl will stop flowing after a short while. Ultimately the hardware item will be very close to the deck and that is the reason that the fastener holes are chamfered (countersunk). This gives an "O" ring of sealant around the fastener. For a given amount of movement the thicker the sealant the more movement is allowed before the seal breaks. When the hardware moves under strain, and it will slightly, the sealant used must allow enough stretch without the seal being broken. Butyl excels at this, more so than any other sealant, which will harden over time and lose its elasticity. My CS27, like Maine's CS36T, was built with butyl under all deck hardware and there are no issues 30+ years later - including the hull/deck joint.

Brian
Living aboard in Victoria Harbour
mitiempo is offline  
Quote Quick Reply Share with Facebook
post #297 of 398 Old 12-04-2013
Member
 
Join Date: Jun 2010
Posts: 75
Thanks: 2
Thanked 2 Times in 2 Posts
Rep Power: 6
 
Re: Bedding Deck Hardware With Butyl Tape

Thanks for the clarification, I guess I will be ordering butyl tape soon. Would you also use this product between wood and fiberglass deck or winches and wood?
endoit is offline  
Quote Quick Reply Share with Facebook
post #298 of 398 Old 12-04-2013
Senior Member
 
mitiempo's Avatar
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,512
Thanks: 0
Thanked 96 Times in 87 Posts
Rep Power: 8
   
Re: Bedding Deck Hardware With Butyl Tape

I would use it anywhere above the waterline where the item is bolted in place. I don't think an item attached with screws can always compress it enough. It can be dissolved by fuel as well.

If attaching wood or to wood I would make sure the wood is sealed and not bare. Varnish, paint, or ideally the wood is epoxy sealed first, as it probably should be anyway for longevity.

Brian
Living aboard in Victoria Harbour
mitiempo is offline  
Quote Quick Reply Share with Facebook
post #299 of 398 Old 12-05-2013
Junior Member
 
Join Date: Feb 2007
Posts: 12
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Bedding Deck Hardware With Butyl Tape

What about bedding deck hardware to an old teak deck? Still use butyl? What would you seal the teak with?
axel is offline  
Quote Quick Reply Share with Facebook
post #300 of 398 Old 12-05-2013
Chastened
 
BubbleheadMd's Avatar
 
Join Date: Nov 2009
Location: Edgewater/Annapolis
Posts: 3,393
Thanks: 2
Thanked 82 Times in 77 Posts
Rep Power: 6
 
Send a message via Yahoo to BubbleheadMd
Re: Bedding Deck Hardware With Butyl Tape

You could seal the deck with Cetol or any of a number of varnishes out there.
Yes, I would seal deck hardware to a wood deck with it.

I do NOT think I would use it for below-the-waterline applications. There are some things that the 3M products are still good for.

S/V Old Shoes
1973 Pearson 30 #255
BubbleheadMd is online now  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Techniques for Removing Teak Decks Sue & Larry Buying a Boat Articles 0 11-24-2003 07:00 PM
Mounting Deck Hardware Tom Wood Gear and Maintenance Articles 0 06-25-2002 08:00 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome