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Old 15-02-2015, 22:36   #1
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Adding copper sulphate to antifoul paint

I've been told that if you and copper sulphate to your anti-foul paint it makes it last a lot longer has anyone had any experience with this.


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Old 15-02-2015, 22:49   #2
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Re: Adding copper sulphate to antifoul paint

There are many things you can add to bottom paint that keeps the bottom clean longer. I have a wood boat with copper plates covering the bottom. Bare copper still allows growth so it's painted.
Adding marine toxins to paint could be dangerous.
In the USA, anything that works well is illegal.
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Old 16-02-2015, 09:18   #3
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Re: Adding copper sulphate to antifoul paint

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Originally Posted by Akapeterc View Post
I've been told that if you and copper sulphate to your anti-foul paint it makes it last a lot longer has anyone had any experience with this.


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Don't you think that if that would work the paint companies would already be doing it?

Buy the best paint that's suited for your conditions, apply it according to the instructions and you will have the longest lasting paint for your conditions.

Or, believe the rumors and add cayenne pepper and ground up pennies to your paint.
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Old 16-02-2015, 11:51   #4
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Re: Adding copper sulphate to antifoul paint

How big is your R&D department? Coating companies spend millions a year trying to discover better paint additives, and better concentration levels of the additives they currently use. Unless you are willing to jump into that race why do you thing a shop brewed paint will work better.

Btw I heard if you add Coke to your engine oil it will increase fuel efficiency.
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Old 16-02-2015, 12:26   #5
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Re: Adding copper sulphate to antifoul paint

So every day, a doorman on Park Avenue see's a man coming out of the building going to work, snapping his fingers. And every day, the man comes home, still snapping his fingers.


One day the doorman's curiosity overcomes his discretion and he says "Excuse me, but I couldn't help noticing you are always snapping your fingers." And the man says "Yes, before I moved here I was told that it will keep away the lions."


Doorman says "But there are no lions in Manhattan, except the stone ones at the library." and the mans says "See how well it works?!"


Yes, there's proof of everything, somewhere out there.
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Old 16-02-2015, 12:29   #6
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Re: Adding copper sulphate to antifoul paint

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Originally Posted by Stumble View Post
How big is your R&D department? Coating companies spend millions a year trying to discover better paint additives, and better concentration levels of the additives they currently use. Unless you are willing to jump into that race why do you thing a shop brewed paint will work better.

Btw I heard if you add Coke to your engine oil it will increase fuel efficiency.
Neaahh, that's bull. Everyone knows that Pepsi is much better for this.
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Old 16-02-2015, 14:29   #7
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Re: Adding copper sulphate to antifoul paint

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In the USA, anything that works well is illegal.
The U.S. adopted the ban on tin-based anti fouling paints, just like most of the rest of this planet's seafaring nations did. With the exception of the few countries that still allow tin paints, ain't nobody nowhere using anything more effective than we can buy at any chandlery.
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Old 16-02-2015, 14:33   #8
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Re: Adding copper sulphate to antifoul paint

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Originally Posted by Akapeterc View Post
I've been told that if you and copper sulphate to your anti-foul paint it makes it last a lot longer has anyone had any experience with this.


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If increased copper is what you want I don't see an reason it cant be done. I think paint companies are limited to a certain level of copper..... that doesn't mean the paint isn't as good as it could be if they weren't limited...
I've definitely read of people adding copper powder to bottom paint.... Not sure how effective copper is as it seems to be a slow retardant... meaning things are already attached by the time they die...
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Old 16-02-2015, 14:39   #9
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Re: Adding copper sulphate to antifoul paint

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I think paint companies are limited to a certain level of copper....
Not the case. Paint manufacturers can formulate anti fouling paints with any amount of biocide they like, providing the biocide is legal for use. If increasing the copper in a particular product was effective, you can bet that product would be on the market.
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Old 16-02-2015, 14:45   #10
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Re: Adding copper sulphate to antifoul paint

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Not the case. Paint manufacturers can formulate anti fouling paints with any amount of biocide they like, providing the biocide is legal for use. If increasing the copper in a particular product was effective, you can bet that product would be on the market.
Good to know. I know I used to use Woolsey Neptune up here in the PNW as it had 60% copper and worked well. Not sure what most mfrs use now....
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