Originally Posted by SaucySailoress
Hey, has anyone had any positive experiences with this stuff in the last few months? We were contemplating it, but don't see the benefits when, if I read correctly:
- We'd need to haulout every year do do a scrub, whereas we can scrub the bottom every few months with scuba now anyway, without the need to haulout
- Three layers of regular antifoul has lasted us three years - so why change to coppercoat which would need an annual haulout in order to do that gentle absrasion thing....?
First year I had this done there was considerable growth on the bottom, So I hauled it out and pressure washed the bottom giving it a mild scrub with Scotchbrite
I contacted AMC and this was there reply
AMC REPLY TO 02 June 2010 Antifoul Copper coat Failure Greece
How does Coppercoat work?
Coppercoat is the combination of a specially developed two-pack epoxy
resin and 99% pure copper. Each litre of Coppercoat contains 2kg of ultra fine copper powder, the maximum allowed by law. On immersion, sea water attacks the exposed pure copper powder, causing the formation of cuprous oxide. This highly effective anti-fouling
agent deters growth until the surface degrades further to become cupric hydrochloride. This final copper form is highly unstable, and is washed away by the movement of the yacht, thereby removing any accumulating silt or slime. This automatically reveals a fresh copper-rich surface whereby the process recommences
What colour is Coppercoat ?
Freshly applied Coppercoat dries to a rich copper brown. After immersion Coppercoat oxidises to a dark, verdigris green colour. This colour change commonly takes several months, depending on water conditions. Because of the sheer quantity of pure copper in Coppercoat, it is simply not possible to produce the coating in any other colours.
What maintenance is necessary?
Correctly applied Coppercoat will continue to deter marine
fouling for many years. The annual chore of repainting associated with conventional anti-foulings is no longer necessary. If, over the months, a slight accumulation of slime does appear, this can be removed by pressure washing
or brushing. An annual wash or brush is recommended. Eventually, usually after several years, the surface may benefit from being lightly abraded with a fine grade of “wet and dry” paper or a burnishing pad to expose fresh copper.
----- Forwarded Message ----
From: AMC Office <firstname.lastname@example.org>
To: Michael Mxxxxxxxxxx <xxxxxxxxx@xxxxxxxxxxx> (I have removed this for privacy)
Sent: Wed, 2 June, 2010 17:25:08
Subject: RE: 02 June 2010 Antifoul Copper coat Failure Greece
Thank you for your e-mail regarding the Coppercoat on your boat in Lefkas.
It is difficult for me to be too specific with my advice concerning the Coppercoat on your particular boat as I have not inspected it and am not fully familiar with this particular application. However, I trust that the comments below will be of some use.
It would be standard practice (and advisable) to clean a Coppercoat treated boat once a season, but as you might expect, some people clean their boats more regularly than this while others do it less frequently. It is down to local need and personal preference. Consequently if there is some slime or barnacle growth on your hull I recommend that it be cleaned by pressure-washing or scrubbing.
Clearly the performance of any anti-foul will vary from location to location and from season to season, and indeed from boat to boat depending on usage. So, while a treatment of anti-foul may keep one boat in one location completely clean for one particular season, a treatment of the same anti-foul on a different boat in a different location with different usage will perform differently. Having supplied Coppercoat to dozens of boats in the Lefkas/Preveza area over recent years we know from good experience just how effective it is in that particular location. Indeed, only yesterday we dispatched another batch to our regular Coppercoat applicator there. Of course, it is impossible for any paint
company to predict the use and location of every boat, but we can give guidelines as to the expected performance of our products.
Commenting on the performance of Coppercoat in general, we know of owners who rarely need to clean their hulls - and I heard from one owner who did not touch the bottom of his boat for five years! However, at the other end of the scale I know of a client in the Caribbean
that dives under his boat and cleans the hull approximately three times a year. There can be no set rules as to how often a hull will need cleaning - but it is sensible to clean the boat as and when necessary to minimize any build up. As I say, for the vast majority of Coppercoat users, a lift
and pressure-wash once a season is sufficient to keep the hull clean.
Interestingly some personal friends of mine used Coppercoat on their Gulfstar
36 back in 1995. They kept this boat in the lagoon
at Simpsons Bay in St Maarten for three years before sailing widely around the Caribbean
and down to South America
. They found that they needed to clean the boat approximately every four to six months when moored in the lagoon
, but far less frequently when they continued on their trip.
While Coppercoat offers a strong degree of protection against most fouling in most locations for many years - it is not a "maintenance-free" product and periodic cleaning of the hull should be expected. Of course, the benefit is that unlike with conventional anti-foul, once the hull has been cleaned you can simply re-launch and do not need to go through the expense and rigmarole of having to apply yet another coat of anti-foul. There is also the environmental benefit of not washing
and scraping off old anti-foul paint
every season - as is commonly required.
Please remember that unlike conventional anti-foul (that starts off at full strength and becomes weaker by the day), Coppercoat is actually quite a mild anti-foul when new. Coppercoat increases in potency as the months and years pass. This is because it takes some time for the epoxy
to begin to break down and allow the formation and release of its powerful anti-fouling
agent cuprous oxide. Consequently it is usual for Coppercoat to perform better in its second year and beyond, than it does in its first year. I predict that you will see a further improvement in the performance of the coating in the coming years.
If/when the boat is out of the water you may benefit from lightly but thoroughly burnishing the surface of the Coppercoat, using a fine grade of wet-and-dry paper or a finishing sanding
pad. This will expose fresh copper and increase the rate at which the copper oxidizes and becomes more active (in an anti-fouling sense). Do not use anything coarse, as the idea is to burnish/polish the surface, not abrade it to give a good key for marine
life to cling too!!! This process is mentioned in the application instructions but I have to admit that most our clients do not bother. In most locations this burnishing (best completed either before or immediately after the first season afloat) is unnecessary, but is a process that you may be beneficial to your particular boat in your particular location.
I hope that this proves useful and please feel free to contact me again should your require further advice.
With best regards,
Aquarius Marine Coatings Ltd.
multiseason antifouling 10 years protection hard wearing copper filled epoxy resin copper antifoul
Tel: +44 (0) 1258 861059
Fax: +44 (0) 1258 861220
It is now a year later 197 engine
hours and 850km later the boat has been in the water all that time and there is hardly any growth at all though there is slightly more on the sunside which is to be expected. I hope this helps.