I don't know about this product specifically, but assume that it is a copper loaded epoxy
/ gel coat?
As an environmentalist, this concept
appealed to me... I used a similar product in the 90s when building my last boat (A searunner
34 tri), and found it to be totally ineffective after the first month, and the copper surface oxidized. This was in the very high growth waters of Beaufort
SC. It actually attracted barnacles
, as the surface was electrically conductive! (I assume because the new company had switched from a copper powder to a copper flake)???
I had put this on at twice the usual thickness and then sanded half of that thickness off! IT WAS PERFECT... This was then sanded with 220# to polish the surface to a copper penny look. It was as smooth as gel coat! Nevertheless, the critters stuck like you would not believe, because unlike bottom paint
, the surface will not slough off when scraping. (which I had to do once a week, taking all day!) The copper "inside" the coating, unlike bottom paint
, is forever sealed away from contact with the water... until you sand to a new surface.
With my SCUBA
outfit... I tried wet/dry sanding
the surface to expose new copper, but it is impossible, as one can not apply sufficient pressure.
When I later tried to paint
over the stuff, the paint failed in the aft half of the main hull
, where the underwater metal was. (it was bonded internally, and at the time, the boat had NO electrical system
. (AC or DC!)
After several attempts I tried epoxy
barrier coating the product in these areas, followed by bottom paint. It also failed! Then grinding it off, taking a week... After several re-painting sessions I ground off enough (far enough back), that the bottom paint would not fail.
It took over ten years and countless thousands of $ to recover from this mistake, but all is well now! These sort of products (> 5 brands), were popular in the late 80s to early 90s, especially with custom multihull
builders like myself and many friends. Between them, I knew of the results of several brands. We ALL came to the same conclusion, after about a year, that it was a flawed concept
, and painted over it with bottom paint. Among them, only the brand that I had chosen could NOT be painted over in areas, and none of my friends had trouble painting over theirs, so I concluded that it was my brand's copper "flake" VS the others copper "powder".
Now, I have no first hand experience of what is out there now, but the above past experience leads me to believe that while the copper "powder" versions can be painted over and are a good "barrier coat", they are most usefull on drysailors that are then hauled out, dinghies, or boats in such low growth but high tide areas that the boat sits on the bottom half of the time. Then the hull
can be resurfaced a bit each week. I wouldn't consider it on the US East Coast
, Or Caribbean.
Good luck, what ever your decision... Mark