TB 43-0242
Mix the two parts well, then let stand 30 minutes
before you use the primer. Don't mix more than
you can use that day, because you can't save
any mixed primer. It will harden in the pot
within 15 hours, and there's no way to prevent
hardening.
g. After application, the primer will dry hard in
30 to 90 minutes and you can add the CARC
topcoat. Use either the two component or single
part CARC listed in Appendix B.
Stir it
thoroughly before use.
h. The topcoat will be dry to the touch in 30
minutes. It will be thcroughly dry in 4 to 6 hours.
It'll be cured enough to withstand impact-like
walking on it-in 6 to 8 hours. Complete curing
takes 7 to 14 days.
5-4.
Unused Paint Treat any leftover paint as
SECTION VI. PAINT FAILURES
hazardous waste. The same goes for the topcoat
component B if it goes bad in the can.
6-1. Reasons for Failure. There are a number of
Good component B should be clear to pale yellow. If it's
reasons that CAR--or any other paintfails soon after
thickened or crystalline in consistency, seal it and get rid
application. Some reasons are:
of it. Your unit's SOP should address how to handle
hazardous waste.
You can also find disposal
a. The surface was improperly prepared. There
information in the Material Safety Data Sheets or at the
was loose or blistered paint, sanding dust,
local Environmental Office. Or write to:
grease or oil, diesel fuel, fingerprints on the
surface, or lacquer used previously was not
Commander
US
Army
Environmental
removed.
Hygiene
Agency
Waste
Disposal
b. No pretreatment or primer was used.
Engineering Division Aberdeen Proving
Ground, MD 21010-5422
The topcoat was applied directly to the bare
metal.
or call them at DSN 584-3651, Commercial (301) 671-
3651.
c. The primer did not have time to dry (flash off
the solvent) before the next coat was applied.
d. The surface was too hot or cold. The paint
didn't have a chance to cure properly.
6-2. What to Do. With most paint failures, the only
sure cure is to strip it down to bare metal and start over.
You'll end up spending a lot more time doing it over than
it would have taken to do it right the first time.
7
