Deck Blisters - Source? - SailNet Community
LinkBack Thread Tools
post #1 of 2 Old 11-28-2010 Thread Starter
Junior Member
Join Date: Nov 2010
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Deck Blisters - Source?

I have a 1968 vintage boat I bought last year. It had zero blisters. It was in serious need of a paint job and this summer I removed all the deck hardware and repainted it. I rebedded the hardware, overboring holes, filling with epoxy and then redrill and bedding with 5300. I now see a few mild deck blisters popping up on the foredeck aft of the bow line cleats and bow pulpit stanchions that I removed/rebedded.

I think the moisture problem is from one of two sources:
1) when I removed the hardware, prior to rebedding and painting, I did not immediately fill the holes, but covered them with tape. I got hit with a couple serious thunderstorms in the interim -- water definitely seeped in under the tape through the holes.

2) perhaps I did not bed the new hardware as well as I thought.

Question: HOw to remedy?

If the problem is #1 as described above, and the moisture is a legacy of a couple downpours that happened months ago and now that the hardware is in place, it is trapped in the deck core and forcing itself out, the problem is probably worse. Can I vent the deck core from the underside? But would it have taken 4 months for this to happend?

If the problme is #2, I can remove and rebed -- althought that will be a PITA (pain in the @ss).

Any suggestions will be appreciated.
SoldieroftheSea is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
post #2 of 2 Old 11-28-2010
Telstar 28
sailingdog's Avatar
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 18 Times in 14 Posts
Rep Power: 16
I would grind out the blisters and fill with thickened epoxy. I doubt the blisters are due to water getting in from when you were re-bedding the hardware, especially if you potted the holes with thickened epoxy as should have been done. If you didn't pot the holes with thickened epoxy, I would recommend re-bedding the hardware and doing that.

I would point out that 3m 5200 is a horrible material for use on a boat, and has very few legitimate uses—the hull-deck or hull-keel joint being two of the few legitimate uses I can think of. You would have been much better off bedding the hardware with butyl tape.

If you don't know what butyl tape is, I'd recommend you read my primer on marine sealants and Maine Sail's website on bedding deck hardware.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

sailingdog is offline  
Quote Quick Reply Share with Facebook

Quick Reply

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


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

Email Address:


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
Blisters, yes another blisters thread johnnyandjebus Gear & Maintenance 7 10-24-2010 05:25 PM
Blisters Flfishindude O'Day 1 05-11-2010 08:40 PM
Split deck cap and leaking hull/deck joint alaskaboy Gear & Maintenance 2 01-04-2008 09:25 PM
through deck coaxial cable-what wonderful suprises await me, my deck and my drill? bwu Catalina 1 11-20-2006 01:06 PM
wet deck - repairs to foam cored deck jheaton Gear & Maintenance 1 04-22-2002 07:17 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