That's good to know. It's also a reason to avoid alkyd enamels, even if you
do use a barrier coat primer first. Later on when you do repairs, you'll
want epoxy to stick to the paint so you can do a repair without having to
reprimer and paint the whole durn boat again. Better to do small repairs
until it gets too ugly and THEN primer and paint the whole boat. I'll stick
with LPU's (pardon the pun).

Brian D



"Paul Oman" wrote in message
...
Brian D wrote:

Good point. Can you repair gouges through LPU on top of epoxy by just
applying more epoxy? I mean, will epoxy stick to LPU very well?

Thx,
Brian D


---- Yes LPU coatings are urethane paints after everything is said and
done and
epoxies regularly go over and bond to well adhered paint..

paul




"Paul Oman" wrote in message
...

A two part urethane (LPU) with uv blocker is tougher more gloss
resistant
etc.
than any epoxy it would be covering

paul oman
progressive epoxy polymers


Brian D wrote:

The other answers are not quite correct ...they are true but are also
missing some info. Look at the bottom of my boat at
http://www.reelboats.com (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.

Brian D

"Robert Haston" wrote in message
ink.net...
I remember reading about uv blockers that could be added to epoxy -
any
experience?

--
Robert Haston
Satellite Beach, FL





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