High-build primer
 

I'm finishing a glass composite boat and intend to use LPU paints. I've been using Interlux 401/414 , applied by roller and brush. I'm generally satisfied with it, but it doesn't build quickly. Is there other primer I should try?

Jim Conlin wrote:
I'm finishing a glass composite boat and intend to use LPU paints. I've been using Interlux 401/414 , applied by roller and brush. I'm generally satisfied with it, but it doesn't build quickly. Is there other primer I should try?

I don't use Interlux so don't recognise what you are using; however, you
should be able to get 3-5 mils per pass with high build primer.

Lew

The Interlux product data sheet for 404/414 recommends only two coats
for use above the waterline, with each coat having a Dry Film Thickness
of only 2 mils. (The only bummer about 404/414 is that you need to
sand between coats...). Could it be that you're after 'high build' to
help solve fairing problems? The primer is simply meant to provide a
tie coat between faired hull and the LPU; to quote I'lux: "Use Epoxy
Barrier-Kote over clear epoxies as a sanding surfacer and to eliminate
the effects of amine blush".

So, high build is not required! If you're after high build to fill-in
some valleys... a batch of microbaloons / cabosil and a putty knife
might be better.

BTW, I'lux has a new LPU system that looks very interesting:
'Perfection'. See the video at: http://www.yachtpaint.com.

MW
Los Angeles

Jim Conlin wrote:

I'm finishing a glass composite boat and intend to use LPU paints.
I've been using Interlux 401/414 , applied by roller and brush. I'm
generally satisfied with it, but it doesn't build quickly. Is there
other primer I should try?

The usual primer for LPU paints is an epoxy (usually solvent thinned) or
sometimes a moisture cured urethane.

The are lots of epoxy companies that sell epoxy coatings with dft of 4 -
16 mils or so per coat rolled. Any would work as a LPU primer.
\
paul oman
progressive epoxy polymers

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