Technical data

turer’s instructions (measuring each component), and spray
the coating on the test panels. Test panels shall be aluminum
measuring approximately 3 inx6in.
NOTE
For this coating test panels must be primed with
either MIL-PRF-23377 or MIL-PRF-85582
primer applied to a thickness of 0.0006 to 0.0009
inch. The coating shall be set-to-touch (when
touched, no material transfers to finger) within
four hours, and dry-hard (finger applied with
reasonable force and turned with no deformation
of coating) within twelve hours after spray
application.
A.5.4 Surface Appearance. When sprayed on one
vertical and one primed horizontal mounted panel to a
thickness of 0.0017 to 0.0023 inch, the coating shall dry to a
smooth, uniform surface free from runs, sags, bubbles,
streaks, hazing, seeding, dusting, floating, mottling, or other
defects and irregularities.
A.6 TOUCH-UP PENS.
(Sempens MIL-PRF-23377/MIL-PRF-85285).
A.6.1 Practical Test. These materials only require a
practical test by the user. Prepare the applicator by sliding the
tube collar all the way to the back of the applicator. Shake the
applicator vigorously by hand until the materials are thor-
oughly mixed (approximately one minute). Brush material on
test surface and determine if it applies evenly. Allow to dry
and verify material meets drying time criteria in Paragraph
A.2 for MIL-PRF-23377 Epoxy Primer/Paragraph A.5 for
MIL-PRF-85285 High Solids Polyurethane. If either practical
test fails, dispose of the item.
Table A-1. Viscosity and Pot Life
Coating and Primer Check Time After Mix (Minimum) Maximum Time
No. 4 Ford Cup No. 2 Zahn Cup
Initial 40 48
MIL-PRF-23377 4 hours 70 84
Initial 30 36
TT-P-2760 4 hours 60 72
(closed container)
Initial 30 36
MIL-PRF-85285 4 hours 60 72
Type I 8 hours shall not gel shall not gel
TO 1-1-8
A-3/(A-4 blank)