[Rhodes22-list] Barrier Coat

[Louis S Rosenberg]

Hank
As a newbie who had done barrier coat to my project boat including a few blisters, here's my take:
I would first assess the hull for any really bad sections.  If you do not see blistering of any kind then you could easily just use the correct bottom paint for your use.  Since I am in NYC and going to be in brackish water most of the time in a secluded part of Bklyn,  I went with  Trinidad SR.   I wanted a hard finish with a high copper content.  I will not use that again due to cost and many other factors, mainly environmental.

I have one large blister which was caused by water seeping down into the aft part of my keel from the cracked table base. I neglected to see how bad it was until earlier this year.   In 2005, after sanding the blister down carefully and applying two layers of epoxy one with barrier coating, painted it and hoped it was all done.  I soon found out that water was leaching down there and causing another blister to form in the same spot.  I purged the blister and let it dry out, fixed the table base , thanks to STAN!! and
now its finally dry again and ready for the barrier coat again.  

I also barrier coated my cb and rudder after overhaul.  Check the owners site for the pdf that Roger Pihlaja and I posted about overhauling a bad cb trunk, rudder and the mechanical advantage.

I am painting my entire deck with a two part epoxy sealant from Dr Rot and then painting it with their Aliphatic255 polyurthane paint.  I am putting the link to their site below for your information.
 
I have been using WEST system for all of my epoxy work so far and theirs is petroleum based  whereas Dr Rot is supposedly another base which is softer and more flexible when dry.  I have not used the DR ROT formula as yet just to be clear.
 stay tuned

http://www.rotdoctor.com

good luck with your boat
Lou

----- Original Message -----
From: Hank <hnw555 at gmail.com>
Date: Friday, May 25, 2007 9:21 am
Subject: [Rhodes22-list] Barrier Coat
To: The Rhodes 22 mail list <rhodes22-list at rhodes22.org>

> Hello fellow Rhodies,
> 
> I'm trying to decide if I should put a barrier coat on my '84 that I bought
> last fall.  When we bought the boat, the anti-fouling bottom paint was 
> in
> atrocious condition.  I used Peel Away to get it off and am now down 
> to the
> gelcoat.  I do not see any evidence of blisters in the gelcoat.  My original
> thought was that I would put on a barrier coat since I was down to this
> point, but after doing more research, I figure it will cost nearly 
> $400 in
> materials and is a bit of a PITA to do.  Do any of you have an opinion 
> on
> this?  Have you ever needed tp put a barrier coat or experienced 
> blisters on
> your boats?  Is it really worth it or necessary or should I just put 
> on the
> bottom paint and go sailing?
> 
> As usual, your comments are greatly appreciated.
> 
> Hank
> 
> P.S.  Hopefully I will finally meet Elton today or tomorrow as he is passing
> nearby with a new bimini and some other parts for me.
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