[C320-list] FW: bottom paint

[Peter Clancy]

Observation ......... I've used Petit Trinidad for at least 15 years in South Florida. I do my own painting and bottom cleaning, so I visually track its effectiveness and rate of wear. I've always gotten at least two years service from a 3-coat application. I've more recently used the SR version, which costs more. In my opinion, SR is just marginally effective in controlling slime and then only for a few months. On balance, it's not worth the extra money and I plan to go back to standard Petit Trinidad in the future.


Peter Clancy
AROBAN  c320  #222
Miami, FL







  ----- Original Message ----- 
  From: Karl Mielenhausen _/) <mailto:kmielen at iwon.com>
  To: C320-List at catalina320.com<mailto:C320-List at catalina320.com> 
  Sent: Tuesday, November 07, 2006 1:33 PM
  Subject: [C320-list] FW: bottom paint



  Koen,



  These are 2 very different types of paint.



  Pettit's Trinidad SR is a modified epoxy containing 70% cuprous oxide plus Ingarol, an anti-slime additive. Modified epoxies release biocide over the course of the season. Toward the end of the coating's useful life, the biocide must migrate further to the surface, adversly affecting its effectiveness. This effect can be offset somewhat by periodic scrubbing. These coatings to do not wear away like ablatives, so they will build up over time. The boat also needs to be launched soon after painting, and stay in the water, so this is not the paint for trailer sailors.



  Interlux's Micron CSC is a copolymer (type of ablative), containing 37% cuprous oxide but no Ingerol (that would be Micron Extra). Ablatives release biocide as the boat moves through the water, so frequent boat use throughout the "growing" season is critical. Divers should use a sponge, not an abrasive pad, when cleaning a hull painted with ablative paint. Extra coats on leading edges are a good idea. Many owners alternate colors so they can better see when the fresh coat has been worn away. Copolymer ablatives can provide multiseason protection as their effectiveness is not lost when drying out.



  So, in answering your question, there are many factors to consider, such as where you are located, how often you use the boat, and are you hauling for the winter.



  If you are not going to re-launch until the spring, the yard did you a favor by NOT using the SR.



  Note: Most of this info came from the Spring 2006 issue of BoatWorks, what I have found to be a very useful publication.



  Karl Mielenhausen

  2000 C320 Hull#690 "Silver Lining"

  New Bern, NC

  http://pages.suddenlink.net/kmielen/<http://pages.suddenlink.net/kmielen/>

  From: Koen Bennebroek [mailto: koen.bennebroek at gmail.com<mailto:koen.bennebroek at gmail.com>]

  To: c320-list at catalina320.com<mailto:c320-list at catalina320.com>

  Date: Tue, 7 Nov 2006 08:54:43 -0800

  Subject: [C320-list] bottom paint



  We had Big Cat hauled and bottom painted this past week. I had agreed<br>with the yard to use Pettit SR as I had heard good things about it. On<br>the bill they indicate that they used Interlux Micron CSC instead.<br><br>I have not spoken to the yard about this yet (and have not paid them<br>yet), but initial checks on westmarine show that this is a cheaper<br>paint. I was wondering what people's experiences are with this paint?<br>Should I expect it to perform as well or not?<br><br>Thanks for any advice!<br><br>-Koen<br><br>

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