[Healeys] 1959 100-6

sentenac.rw at gmail.com sentenac.rw at gmail.com
Thu Jul 31 10:46:36 MDT 2014


On Thu, 31 Jul 2014 09:30:20 -0400, you wrote:

I just checked again to be sure.  PPG epoxy primers do not have
isocyanates.  Other PPG primers DO but not the epoxy primers.  I have
used PPG epoxy primers over ten years, both the older DP40 and the
newer stuff.  Both are good base coats next to bare metal, and can be
a seal coat over the (sanded) filling primers.  Old PPG primers like
Kondar are just thinned with laquer thinner and no hardener.  But the
new primer-surfacer stuff is hardened with isocyanates.

The only thing about PPG epoxy primer is that if you don't cover it
with other primer or top coat within something like a week you have to
sand and recoat the epoxy before you cover it.  But for amateur
restorers having a very rust resistant coating on metal is worth the
hassle when it comes time months later to finish the painting job.

-Roland

On Thu, 31 Jul 2014 09:30:20 -0400, you wrote:

>The PPG DP primers are great, but they don't come without risk for the
>do-it-yourselfer.  Like other epoxy paints, they contain isocyanates, which
>are poisonous.  A normal face respirator isn't sufficient protection and
>they have a cumulative effect that can actually coat the inside of your
>lungs.  I've known a few painters who've had to quit the profession as
>they've been told further exposure would kill them.  The manufactures
>recommend a full face fresh air supplied respirator as well as full body
>protection for application.  Google "*Questions and Answers About the Safe
>Use* of.
>*Isocyanates" to go to the PPG fact sheet.  *


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