Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 30-04-2023, 08:42   #1
Marine Service Provider

Join Date: Aug 2013
Location: Victoria BC
Boat: Cal 2-46'
Posts: 672
Blister/ osmosis repair successes? Failures?

Iím interested in knowing if anyone can report their successes or failures with large scale osmosis repair. Iím not talking about a few individual blisters but rather large numbers of small blisters of varying depth covering the entire hull.
I have read about pealing, drying, delaminating and or barrier coating etc but I have also heard of folks spending the big $$$$ on this type of fix only to be disappointed a few years later with recurrence of the problem.
If you had success and youíre in the PNW, maybe let us know who did the work.
Thank you
__________________
Nick & John
Ground Tackle Marine Ltd
groundtackle is offline   Reply With Quote
Old 30-04-2023, 09:07   #2
Registered User
 
Cheechako's Avatar

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 25,619
Re: Blister/ osmosis repair successes? Failures?

If you are talking real small blisters: I had one boat years ago with hundreds/thousands of small BB size blisters. They were not deep. Removing the Gel coat by grinding to expose them, then letting it dry for a 3-4 weeks and epoxy resin coating seemed successful. The gel was thick on that boat, I ground the tops off the 'BB's' essentially. All gel was not removed except in some areas. It dried out well.

I had another boat earlier that had severe blisters, up to 3/16" or so deep. A couple patches were 4" long x 1.5" wide! I ground all of them out and let dry for weeks. Filled and epoxied. I'm not sure that boat would have lasted too long with the repair but it lasted a couple of years after and I sold it.

Both these were like 30 years ago though.

I have seen boats in the post peeled condition in the big yard in Anacortes. It looked like it would surely fix the problem, but looks like a ton of cost and work. Not sure how much glass was added after it dried. Looked dry when I saw it and the glass surface was a bit rough which would have been great to bind new glass onto.
But we're talking a major expense there and many hours.

Drying and filling blisters works pretty well really on boats that aren't saturated... If you have to do that every 3-4 years it's a lot less money.
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is online now   Reply With Quote
Old 30-04-2023, 09:12   #3
Registered User

Join Date: Aug 2013
Location: Back in Montt.
Boat: Westerly Sealord
Posts: 8,218
Re: Blister/ osmosis repair successes? Failures?

I'm not in the PNW but sorted mine in New Zealand with Osmosis Solutions, Gulf Harbour.
Full peel, HotVac treatment, and then Vinyl Ester.
https://www.osmosis.co.nz/gallery/sa...de/page_1.html
That was 2014, still going good.

https://www.hotvac.com/default.aspx
Seems there is a HotVac operation in Oregon.
Not cheap.
__________________
A little bit about Chile can be found here https://www.docdroid.net/bO63FbL/202...anchorages-pdf
El Pinguino is offline   Reply With Quote
Old 30-04-2023, 10:31   #4
Registered User

Join Date: Mar 2017
Location: Annapolis
Boat: OíDay 40
Posts: 215
Re: Blister/ osmosis repair successes? Failures?

A few years back I had a boat that looked like it had been a backstop at a Turkey shoot. Soda blast, dry out, West System epoxy, sand until your arms ache, sand some more, barrier coat 3 layers, sand some more, bottom paint. Worked great, almost killed me.
LouK is offline   Reply With Quote
Old 30-04-2023, 12:35   #5
Registered User

Join Date: Sep 2017
Location: Langley, WA
Boat: Nordic 44
Posts: 2,540
Re: Blister/ osmosis repair successes? Failures?

Similar to Cheechako I bought my boat with hundreds of blisters. They were mostly between the gelcoat and the laminate. A few were into the laminate. They were all gouged out. The entire bottom was hand sanded by me and my brothers and left to dry over the winter in Chicago. In the spring it was sanded again, spot epoxied, faired and got five coats of Interprotect 2000. Seventeen years later a few blisters appeared. It was done all over again on a much smaller scale. No blisters back since. Still have the same boat almost 33 years later.
stormalong is offline   Reply With Quote
Old 30-04-2023, 20:16   #6
Registered User
 
Fore and Aft's Avatar

Join Date: Jan 2015
Location: Gympie
Boat: Volkscruiser
Posts: 2,773
Re: Blister/ osmosis repair successes? Failures?

Groundtackle I survey plenty of boats that have had major osmosis repairs. The failures I have seen have been when the hull was never dried before new fibreglass was laminated back on the hull. If the hulls been dried, fibreglassed and faired properly there should never be an issue again.
Cheers
Fore and Aft is offline   Reply With Quote
Reply

Tags
osmosis, repair

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Pypilot successes and failures Jammer Marine Electronics 2 13-10-2021 08:05
Lipari undergoing osmosis treatment vs. One that is not supposedly having osmosis Te81611 Multihull Sailboats 18 10-08-2017 09:20
Leakless Composite Decks - Your: Thoughts, Successes, & Failures UNCIVILIZED Construction, Maintenance & Refit 4 05-06-2017 20:14
Lipari 41: 41 with Osmosis treatment vs. one that has not shown osmosis Te81611 Fountaine Pajot 16 10-11-2015 08:16
Maine Passage - Successes and failures, Moving On... skipgundlach General Sailing Forum 2 20-08-2008 08:20

Advertise Here


All times are GMT -7. The time now is 11:45.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.