Is my bottom paint going to fall off? - SailNet Community
 
LinkBack Thread Tools
post #1 of 4 Old 05-19-2009 Thread Starter
Junior Member
 
Join Date: Mar 2008
Location: Seattle
Posts: 23
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Is Interprotect going to fall off if it's over old antifouling in some places?

I have a cast iron keel that had a bit of rust when I hauled (as is always the case) so we spot-sanded off any rusty spots to bare metal. After going at it for a while some of the spots started to get bigger and bigger, so we decided to take all the paint off the keel down to the last epoxy coat, fill any voids with thickened westsystem epoxy and apply several coats of interprotect 2000e (just to the keel).

This is what we did, except now I am worried that we mistook some old areas of antifouling for epoxy and that the interprotect is over top of that antifouling in some places. We are almost at the point of putting on the antifouling on the whole hull (a few hours to go before the 3rd coat of interprotect is ready to overcoat) and I pulled a piece of tape off the keel and some of the interprotect came off with it, down to a thin layer of blue beneath it.

Is it worth even putting on new antifouling now, or is the interprotect simply going to come off anywhere its in contact with an old antifouling?

Am I going to have to sandblast or strip the keel now and totally start from scratch? If so I'd better go tell the yard guys we won't be launching on Thursday...

Last edited by cosmoking; 05-19-2009 at 07:51 PM. Reason: clarification
cosmoking is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 4 Old 05-19-2009
Senior Member
 
JimsCAL's Avatar
 
Join Date: May 2007
Location: Glen Cove, NY
Posts: 2,771
Thanks: 2
Thanked 68 Times in 63 Posts
Rep Power: 9
 
I think you should be fine. I have stripped my iron keel three times in the 20 years I've owned the boat and applied Interprotect 2000. I am sure I didn't get 100% of the antifouling off each time. No problems with adhesion. You do need to lightly sand I2000 between coats if you let it cure completely.
JimsCAL is offline  
Quote Quick Reply Share with Facebook
post #3 of 4 Old 05-19-2009 Thread Starter
Junior Member
 
Join Date: Mar 2008
Location: Seattle
Posts: 23
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Phew I was starting to get this really nauseous feeling at the thought of sanding the keel again!

But if anyone has advice to the contrary (even if it's not what I want to hear), please do tell. Otherwise going to start putting on the antifouling tonight when the interprotect passes the thumbprint test. Even though it's sprinkling a bit outside, my plastic around the boat has it fairly shielded from the rain... gotta love Seattle.
cosmoking is offline  
Quote Quick Reply Share with Facebook
post #4 of 4 Old 05-19-2009
Here .. Pull this
 
Join Date: Jan 2007
Posts: 2,031
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Quote:
Am I going to have to sandblast or strip the keel now and totally start from scratch?
I think that it would be the best course of action. You MIGHT not have any problems but I would be surprised if the barrier coat lasted as long as it could.

In the winter the metal, the anti-fouling and the epoxy are all going to contract and expand at slightly different rates so there is the potential for the epoxy to work its way loose. If you are in a warm climate it's probably not as big an issue.
Sailormann is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

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
Bottom Paint Questions harbin2 Gear & Maintenance 8 02-22-2009 12:09 PM
New Boat and Bottom Paint Qustion snider General Discussion (sailing related) 3 02-08-2009 09:33 PM
Questions: Bottom paint prep work for trailer boat venturousviking Gear & Maintenance 22 04-23-2008 10:48 AM
bottom fairing and paint sailorbri Racing 4 09-22-2006 10:30 PM
Bottom Job question(s) rookie00 Gear & Maintenance 19 03-19-2003 03:01 AM

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