The other answers are not quite correct ...they are true but are also
missing some info. Look at the bottom of my boat at
<a rel="nofollow" style='text-decoration: none;' href="http://www.reelboats.com" target="_blank">http://www.reelboats.com</a> (page through the construction notes and photos)
and look at the graphite bottom. I put about a teaspoon of graphite into
each 2 ounces of epoxy AND I used System III SB-112 epoxy. The SB-112 epoxy
was developed for surfboards, no top coat required. It already has UV
inhibitors built in. It's also safe to use on polystyrene and similar
materials without them dissolving before your eyes when you apply the epoxy.
The only thing that I have to say is that you get best results if you sand
before putting it on, and don't write on the boat with a permanent pen
before coating with it (it is permanent-pen-phobic as far as I can tell,
grinz.) I won't tell you about how I found out these two things ...just put
it on clean sanded epoxy or wood and you'll be happy. Works great.
If you don't want to use the SB-112, then you are pretty much limited to a
topcoat such as paint or a good marine varnish with UV inhibitors in it. I
don't know of any other UV inhibited epoxy out there. The graphite alone is
used by a great many people and I've done it with regular epoxy too, and
never had it chalk up or get cloudy or otherwise indicate that UV
degradation was occurring. Of course that was only on boat bottoms here in
the Pacific Northwest (US) where it never really gets hot anyway. Your
mileage may vary. On the big boat referenced above, I found out about the
SB-112 in time and just said to heck with it ...paid the price for the stuff
AND added graphite. I'm happy. The smallest kit put 2 coats on the boat.
Cheap enough for me.
"Robert Haston" wrote in message
>I remember reading about uv blockers that could be added to epoxy - any
> Robert Haston
> Satellite Beach, FL
> >> Stay informed about: uv blocker for epoxy