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 12-05-2021, 09:14   #1
Senior Cruiser
 
djousset's Avatar

Cruisers Forum Supporter

Join Date: Nov 2017
Location: USA, NH
Boat: Pearson 33
Posts: 141
Lead Keel prep advice

It's my first time doing this level of work and I'd like some advice.

Iím in the final stages of keel/hull fairing and painting (and found this video which appears to be good adviceÖfeel free to confirm or confuteÖ.)
https://youtu.be/cH5vMiNBCsU

In a few small areas of the keel I am down to lead and need to know best practices for prep before filling/fairing? Will epoxy adhere without an intermediary agent?
__________________
diane
s/v Desiderata

"The cure for anything is saltwater - sweat, tears or the sea."
djousset is offline   Reply With Quote
Old 12-05-2021, 09:56   #2
Moderator
 
Dockhead's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: Denmark (Winter), Helsinki (Summer); Cruising the Baltic Sea this year!
Boat: Cutter-Rigged Moody 54
Posts: 31,330
Re: Lead Keel prep advice

All I can say is be careful.

I did my own lead keel a couple of years ago, investing a lot of labor into that, and the paint and everything fell right off of it

Last year I had it sandblasted and done professionally. It seems to be holding now.

I had followed -- I thought -- the required procedures. I carefully degreased the keel and applied an epoxy two-pack primer which was specifically ok for lead.

The very nice guy who did my keel last year told me my mistake was not immediately applying the primer. He said that lead oxidizes quickly and that epoxy doesn't stick to the oxidization. He said you have to paint within a hour (or something) of sandblasting.

Don't know if that's true, but his work seems to be holding up. I found nothign about that in all my careful reading leading up to doing it myself.

I suggest doing thorough research on the correct procedure and materials.
__________________
"Parce que je suis heureux en mer, et peut-Ítre pour sauver mon ame. . . "
Dockhead is offline   Reply With Quote
Old 12-05-2021, 14:07   #3
Registered User

Join Date: May 2012
Location: Halifax, NS, Canada
Boat: 47' Steel Roberts Cutter
Posts: 393
Re: Lead Keel prep advice

Thereís nothing quite so valuable as a fellow who has been there, done that, made the mistakes, wears the tee shirt and is willing to share to help others.

Thanks DH
NSboatman is offline   Reply With Quote
Old 12-05-2021, 15:10   #4
Moderator
 
roverhi's Avatar

Join Date: Aug 2005
Location: Kona, Hawaii, Carlsbad, CA
Boat: 1969 Pearson 35 #108 & 1976 Sabre 28
Posts: 7,441
Send a message via Yahoo to roverhi
Re: Lead Keel prep advice

Best advice I've heard is to use a wire brush to apply the epoxy coating after sanding/blasting to bright medal. The wire brush will insure getting the epoxy or whatever onto unoxidized surface.
__________________
Peter O.
'Ae'a, Pearson 35
'Ms American Pie', Sabre 28 Mark II
roverhi is offline   Reply With Quote
Old 13-05-2021, 08:28   #5
Registered User

Join Date: Jul 2012
Location: North East USA
Boat: 1975 Tartan 41'
Posts: 812
Re: Lead Keel prep advice

Quote:
Originally Posted by roverhi View Post
Best advice I've heard is to use a wire brush to apply the epoxy coating after sanding/blasting to bright medal. The wire brush will insure getting the epoxy or whatever onto unoxidized surface.
This worked for me. Lead will tarnish when exposed to air, not visibly but compromises bonding. Epoxy will bond fine, but you should sand and apply epoxy as soon as possible, and wire brush it in "neat" (not thickened) before coating with thickened epoxy if need to fill/fair. I've had success with both interlux 2000 epoxy primer (applied immediately after sanding without wire brush, then followed with 4 more hot coats applied when previous coat was 'green') as well as 'laminating' epoxy to fill a ding (applied neat with wire brush, then filled with thickened epoxy)
zstine is offline   Reply With Quote
Old 13-05-2021, 08:34   #6
Registered User

Join Date: Jan 2008
Location: SF Bay Area (Boat Sold)
Boat: Former owner of a Valiant V40
Posts: 911
Re: Lead Keel prep advice

Yes, what the others have said about using a wire brush to apply an appropriate primer immediately after taking the lead to bare metal. I prefer a very coarse grit (24 - 40) surface to provide additional grip for the epoxy.
jamhass is offline   Reply With Quote
Old 13-05-2021, 08:54   #7
Registered User

Join Date: Oct 2020
Location: Sparrows Point Maryland USA
Boat: 1968 Columbia 36
Posts: 36
Re: Lead Keel prep advice

As others have said, oxidation is the problem. Here is what I did this winter when i had some exposed lead after checking on keel-hull joint.


Sand whole area down to fresh lead right before applying epoxy primer.
Clean and degrease as normal.
Apply first coat of epoxy primer to exposed lead and wet sand it into the lead with very rough sand paper ( I used 60 grit). This will be messy.... The wet sanding gets the epoxy into fresh lead that is never exposed to the air to oxidize.
I then followed that up with a hammer and chisel to cross hatch the lead under the still wet epoxy.
Brush/roll the epoxy smooth again. continue as normal with all top coats. As far as I know stuck perfectly.
Fishzine is offline   Reply With Quote
Old 13-05-2021, 09:07   #8
Registered User

Join Date: May 2012
Location: Halifax, NS, Canada
Boat: 47' Steel Roberts Cutter
Posts: 393
Re: Lead Keel prep advice

Thereís nothing quite so valuable as a fellow who has been there, done that, made the mistakes, wears the tee shirt and is willing to share to help others.

Thanks DH
NSboatman is offline   Reply With Quote
Old 13-05-2021, 16:53   #9
Registered User

Join Date: Jun 2016
Location: Jensen Beach, Fl
Boat: O'Day 34
Posts: 328
Re: Lead Keel prep advice

My lead keel to fiberglass keel stub continuously weeped when on the hard and slowly leaked into the bilge when in the water. After several tries at grinding and sealing with 5200 I bit the bullet and ground the joint down to the gel coat and bare lead with an angle grinder using 40 grit. I immediately saturated 12Ē wide strips of 16 oz. bi-axial FG with epoxy resin and applied it to the keel joint, again saturating it and rolling the excess resin out. I repeated this process for a total of 2 layers. The next day, I ground the glass and lead again and Applied fairing compound. After fairing, I ground it once more and immediately applied 5 coats of 2-part barrier coat epoxy, waiting the appropriate time between coats. I then applied 4 coats of SeaHawk Cupracoat bottom paint. Iíve had it on the hard during hurricane season for the past 2 years and it hasnít weeped a drop of water and the bottom paint looks great.
Attached Thumbnails
Click image for larger version

Name:	0188790B-28C6-41B2-A1D2-996EE0C14CDA.jpg
Views:	12
Size:	435.9 KB
ID:	238343  
Quadrille in JB is offline   Reply With Quote
Reply

Tags
Advice, keel

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
Disaster prep. Need advice RichandHelen Anchoring & Mooring 0 11-09-2018 15:15
Keel J bolt replacement in lead keel Matt Johnson Construction, Maintenance & Refit 24 15-01-2015 05:11
Lead keel vertical cracks in lead Secondwave Construction, Maintenance & Refit 4 21-05-2013 08:50
Hurricane Sandy - What Prep and Advice for Next Time? westsail374 Seamanship & Boat Handling 14 28-10-2012 12:35
Bulge in Wing Keel Lead Panamajames Construction, Maintenance & Refit 5 01-06-2009 05:10

Advertise Here


All times are GMT -7. The time now is 20:25.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.