Re: [bolger] Wyo - Copper/Epoxy coating.
Next batch you paint, sent me a square and I will weight it and hang it
off the back of my boat for a test run.
Every thing I have read suggests that it will resist hard growths for a
loooong time but you need to scrub regularly for soft.
> Today I coated both bottoms of the front section and the
> cockpit section with copper / epoxy. I bought copper power and
> mixed it with epoxy to come up with the home brew of
> CopperPoxy. I mixed up a gallon since that's what the
> CopperPoxy page said it would take to cover the two sections.
> I measured out 2/3 gallon of resin and 1/3 gallon of hardner
> into two large coffee cans and added the same ratio of copper
> to each for a 3lbs / gallon mix. It seemed thin enough so I
> added another lb. of copper This seems about right without
> thinning the epoxy. The range is 3-5 lbs per gallon but I think
> 5lbs. would be a bit too much without thinning. I rolled on
> two coats 6 hours apart and on the second coat, the copper
> color really came out.
> This is very easy to work with and the Very Slow hardener from
> RAKA gave me more than enough working time in 85 degree weather
> to mix and roll on about 16 oz. at a time.
> A couple notes, this stuff mixes hard so a paint mixer is a big
> help. I used coffee cans and the copper/resin is fine but the
> copper/hardner got a dark tone to it. I think the
> copper/hardner/tin can all combined and set up a reaction. It
> did rolled on without discoloring and setup fine. Don't know,
> maybe some chemist out there will know but I'm using plastic
> jugs next time.
> One more note, mix it constantly as the copper is much heavier
> than the resin and will settle to the bottom fairly fast.
> Over all I'd recommend this method to get $100.00/gallon
> copper/epoxy rather than 4 times that amount at the store.
> 4lbs seemed about right too for the RAKA epoxy. Rolled nice
> enough but don't use a brush, it doesn't work at all. To brush
> I'd go to the 3 lbs. / gallon mix and thin it alot.
> I'll post pictures next week on my site.
> Bolger rules!!!
> - no cursing, flaming, trolling, spamming, or flogging dead horses
> - stay on topic, stay on thread, punctuate, no 'Ed, thanks, Fred' posts
> - add your comments at the TOP and SIGN your posts and <snip> away
> - To order plans: Mr. Philip C. Bolger, P.O. Box 1209, Gloucester, MA, 01930, Fax: (978) 282-1349
> - Unsubscribe: firstname.lastname@example.org
> - Open discussion: email@example.com
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
- --- In bolger@y..., "Harry W. James" <welshman@p...> wrote:
> Jeffhang it
> Next batch you paint, sent me a square and I will weight it and
> off the back of my boat for a test run.Will do but it'll be awhile. I could rescue the paint tray out of
the trash bin and cut up a 6" square and send it, otherwise I'll
paint up some Maranti sometime in October or Nov. When I hopefully
to the bottom of the last section. You could test the durability of
Maranti at the same time.
Thanks for that report. Where did you get your copper powder?
[Non-text portions of this message have been removed]
- --- In bolger@y..., "david@s..." <juliejj@n...> wrote:
> Jeff,I wasn't sure that anyone had actually done the home made stuff
> Thanks for that report. Where did you get your copper powder?
before so I posted my report.
Here is the link to the site where I got the copper.
I'm sure different epoxys will have different mixing results but the
website has good instructions on thinning but I didn't have to
thin. I applied it at a rate of about 360 sq ft per gallon. Two
coats made it a coverage of about 180 sq Ft per gallon.
It's not the best bottom coating labor wise because it will need a
light scrubbing every 90 days or so to get the scum off or the hard
growth will attach to that stuff. I opted for it because it's epoxy
and can set out of the water forever and not lose it's
effectiveness. Just a light scrub with a brillo pad to remove the
tarnish and your good to go.
I was curious how the copper could be exposed being imbedded in
epoxy but early this AM I went out and ran my fingers over the
finish. A couple hours later, the copper had slightly tarnished the
same as the bottom of a copper kettle reacting to finger prints so
it must be well exposed.