[Public-List] Coppercoat Anti-foul

Meinhold, Michael J. MICHAEL.J.MEINHOLD at saic.com
Mon Apr 13 13:13:50 PDT 2009


Jack Hornor estimated the wetted surface of the A30 as 204 ft^2 or 19.0 m^2 using the builder's lines.

Mike
Rinn Duin #272

-----Original Message-----
From: public-list-bounces at lists.alberg30.org [mailto:public-list-bounces at lists.alberg30.org] On Behalf Of crufone at comcast.net
Sent: Monday, April 13, 2009 3:10 PM
To: Alberg, Public List
Subject: [Public-List] Coppercoat Anti-foul



Mike and others, 



Just got off the phone with the U.S. rep for www.coppercoatusa.com .  Jim mentioned that if Alberg 30's as a class have very few problems with hull blisters then no barrier coat would be necessary prior to application of Coppercoat.  Jim was just erring on the safe side.   He prefers to have more protection than not enough. 



I would say that if your particular Alberg 30 hull is blister free then a barrier coat would not be needed.  If your hull has blister problems then grind them out, dry the hull, and apply a barrier coat prior to the Coppercoat anti-foul. 



On your question of maintenance.  Power washing and light sanding is all that is required prior to application of future coats of Coppercoat.  Jim mentioned that to date the only boats requiring additional application are those boats which have scuffed bottoms from running a ground or collision damage. 



The Coppercoat system is four coats @ 2.5 mils each totaling 10 mils.  In 19 years of study the average ablation is 1/4 mil per year.  So the original system application would provide 40 years of ablative protection. 



Shelf life of the unmixed product is 1 year.  But boats can be painted and not launched for several years without any loss of effectiveness to the anti-foul properties.  Hauling and relaunch has no effect on diminishing the properties of the anti-foul agent. 


I am working with Jim on an order for my boat and he estimated somewhere between 5 and 6 litres would be needed.  He is doing a bottom job on a similar sailboat this week and is going to double check the coverage rates. 



If anybody has their boat on the hard and can measure from the boot stripe down to the bottom of the keel (holding the tape directly against the hull) at the deepest part of the keel, this would provide a more accurate measurement for sq.ft. of underwater hull surface.  I am using the draft of 4' 6", but this measurement against the hull would be somewhat longer. This new measurement plus using the LWL and beam would provide more accuracy. 



Michael 



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