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02-05-2011, 06:44
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#1
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Marine Service Provider
Join Date: Mar 2010
Location: Angra dos Reis, Brazil
Boat: Catamaran, FP 40 ft
Posts: 184
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Antifoul Paint
Greetings esteemed forum members!
I need to re-do the anti foul paint of my 40ft Fountaine Pajot (Lavezzi). I pretend to apply 1 sealant/primer and then 3 layers of paint. Question: for this size of Cat, how much gallons of paint would i need (or how much sq meters is the underwater line?)
Thank you very much,
Fair winds
Best rgds
Pieter Kommerij
SV Onda Boa
www.luminacharters.com.br
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02-05-2011, 06:53
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#2
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Moderator
Join Date: Aug 2009
Location: Solent, England
Boat: Moody 31
Posts: 18,398
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Re: Antifoul paint
Pieter hi,
Not sure how much paint you will need, but the manufacturers tend to give guidelines on there websites.
However, if the hull has already been antifouled and the new paint is compatable with the old why the barrier layer? also why 3 layers, won't 2 good coats do? again worth reading the wedsites. It would save an awful lot of work and some money
Pete
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02-05-2011, 19:54
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#3
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Marine Service Provider
Join Date: Mar 2010
Location: Angra dos Reis, Brazil
Boat: Catamaran, FP 40 ft
Posts: 184
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Re: Antifoul paint
Quote:
Originally Posted by Pete7
Pieter hi,
Not sure how much paint you will need, but the manufacturers tend to give guidelines on there websites.
However, if the hull has already been antifouled and the new paint is compatable with the old why the barrier layer? also why 3 layers, won't 2 good coats do? again worth reading the wedsites. It would save an awful lot of work and some money
Pete
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Thanks Pete for yr comments. As i dont know if the new antifoul paint will be competible, and on some spots the paint has totally gone, i decided to paint with primer first, and i guess you are right on the 2 layers instead of 3. Thanks for the return and all the best
Pieter
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02-05-2011, 20:00
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#4
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Registered User
Join Date: Oct 2010
Location: Kansas City, MO
Boat: In the hunt again, unknown
Posts: 1,331
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Re: Antifoul paint
You could contact Interlux or visit their website. I believe they have a formula to calculate the amount of paint you'll need.
Oh, and they can help you select a paint that will be compatable with your current paint.
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02-05-2011, 21:49
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#5
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CF Adviser
Join Date: Dec 2008
Location: sausalito
Boat: 14 meter sloop
Posts: 7,260
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Re: Antifoul paint
Quote:
Originally Posted by Pieter
I pretend to apply 1 sealant/primer and then 3 layers of paint. Question: for this size of Cat, how much gallons of paint would i need (or how much sq meters is the underwater line?)
www.luminacharters.com.br
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Three layers of antifoul over a layer of sealant?
Overkill.
__________________
cruising is entirely about showing up--in boat shoes.
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03-05-2011, 03:15
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#6
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Registered User
Join Date: Nov 2009
Location: Carribean
Boat: Wauquiez Centurian 42'
Posts: 271
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Re: Antifoul Paint
Be sure to also check how long to stir or mix the paint. This season was the first time we painted the bottom ourselves and the first coat was not mixed as well as it should have been. Fortunately according to the manufacturer (Pettit) we don't have to resand just go over it again but I don't have confidence the first coat will do it's job.
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03-05-2011, 03:23
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#7
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Marine Service Provider
Join Date: Dec 2006
Location: Brisbane Australia
Boat: Multihulls - cats and Tris
Posts: 4,859
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Re: Antifoul Paint
I have a 10.85 metre cat and I use 10 litres for two coats (Altex #5) that gives me a fair bit extra to give the rudders and minikeels an extra coat as well as the leading edge of the bows.
Totally off topic, anyone else bemused by the fact the French boats come from the home of the metric system but still use feet, must say something about selling into USA I suppose
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03-05-2011, 05:29
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#8
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Registered User
Join Date: Dec 2005
Location: Worcester U.K.
Boat: Privilege 435 Now Sold
Posts: 1,060
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Re: Antifoul Paint
Quote:
Originally Posted by Factor
I have a 10.85 metre cat and I use 10 litres for two coats (Altex #5) that gives me a fair bit extra to give the rudders and minikeels an extra coat as well as the leading edge of the bows.
Totally off topic, anyone else bemused by the fact the French boats come from the home of the metric system but still use feet, must say something about selling into USA I suppose
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44ft sounds much bigger than 13 point something metres. The French aren't stupid!
Just used 4 gallons of Island 44 for two coats on a Privilege 435.
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03-05-2011, 05:48
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#9
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Marine Service Provider
Join Date: Dec 2006
Location: Brisbane Australia
Boat: Multihulls - cats and Tris
Posts: 4,859
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Re: Antifoul Paint
Quote:
Originally Posted by Jeannius
44ft sounds much bigger than 13 point something metres. The French aren't stupid!
Just used 4 gallons of Island 44 for two coats on a Privilege 435.
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They may not be stupid but they cant read a tape measure, the Orana 44 is in fact a 43 foot long boat. But back on topic your use of 18 litres on that size boat seems to roughly fit in with my usage. It would appear that our OP may have an answer
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03-05-2011, 10:58
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#10
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Registered User
Join Date: Dec 2005
Location: Worcester U.K.
Boat: Privilege 435 Now Sold
Posts: 1,060
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Re: Antifoul Paint
Funnily enough my 435 is 44 ft and the 465 Privilege is 'usually' 49ft. I say usually because there asre a few basic 465s around that are 46 ft but the majority of them are the Easy Cruise version which is 49ft
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12-05-2011, 15:40
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#11
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Marine Service Provider
Join Date: Mar 2010
Location: Angra dos Reis, Brazil
Boat: Catamaran, FP 40 ft
Posts: 184
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Re: Antifoul Paint
Great info, and thanks a lot for the input... Overhere, the toppic of antifoul painting is usualy covered with mystique and a lot of people have their own secret (?) mixture... I decided on using Renner antifoul paint, bought three gallons, wont do the primer, as i know that in our waters i will have to beach my FP next year anyhow for a new paint... Thanks and best rgds
Pieter Kommerij
SV Onda Boa
Lumina Charter | Velejar num Catamarã | Angra dos Reis | RJ | Brasil
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13-05-2011, 03:50
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#12
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Marine Service Provider
Join Date: Nov 2010
Posts: 911
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Re: Antifoul Paint
Down this way most of the boat owners put in half a cup of roundup (weed killer) into the anti foul; it stops barnacles in their tracks. One guy dud it as a test, used roundup on half the hull. Had to haul out to scrape down half of his boat! Should have done the whole lot and just measured growth over time.
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13-05-2011, 04:01
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#13
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Moderator
Join Date: Aug 2009
Location: Solent, England
Boat: Moody 31
Posts: 18,398
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Re: Antifoul Paint
Does round up dissolve okay in an oil paint?
Pete
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13-05-2011, 04:13
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#14
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Marine Service Provider
Join Date: Nov 2010
Posts: 911
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Re: Antifoul Paint
Good question, it certainly must I would assume. You are talking about a very small amount, certainly worth testing. The greenies wouldn't be happy if they knew people were doing it.
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13-05-2011, 04:17
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#15
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Registered User
Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,131
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Re: Antifoul Paint
Quote:
Originally Posted by ausaviator
Good question, it certainly must I would assume. You are talking about a very small amount, certainly worth testing. The greenies wouldn't be happy if they knew people were doing it.
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--but the undertakers will!!
Round-up, used on weeds, made a friend of mine very ill from inhalation.
__________________
so many projects--so little time !!
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