TM 1-1270-476-30
2-19
2-6. SEALING COMPOUNDS AND ADHESIVES REMOVAL, APPLICATION, CURING, AND
OUTGASSING (cont)
REMOVAL
a. Remove cured compound by one or both of
the following methods:
(1) Scrub with wire brush.
(2) Run screw or bolt in and out of
threaded insert until threads are clean.
APPLICATION (Work life is 5 minutes when
applied over grade T primer and 10 minutes when
applied over grade N primer.)
CAUTION
• Locking compounds soften or pit surfaces of
plastics, and lacquer type finishes.
• Do not use locking compounds on plastics or
lacquer type finishes.
NOTE
Apply locking compound within 8 hours after
priming.
b. Prime all parts (2 above).
NOTE
There are two ways to apply sealing, locking,
and retaining compound.
• Type I application - the locking compound is
applied to mounting hardware before
installation.
• Type II application - the locking compound is
applied to mounting hardware after
installation and final adjustments are made.
c. Apply locking compound using a soft brush
or applicator nozzle supplied with locking
compound.
NOTE
Remove excess uncured compound using a
cloth and toluene or trichloroethane.
CURING
d. Cure compound applied over grade T
primer for 1 hour at 45°F or above.
e. Cure compound applied over grade N
primer for 5 hours at 45°F or above.
END OF TASK
4. INSULATING COMPOUND (CONFORMAL
COATING)
WARNING
TRICHLOROETHANE
• Flammable, toxic, irritating. Can cause
breathing problems, eye damage.
• At 325°F, gives off phosgene gas, which can
cause death or serious injury.
• Don’t: Use near flames or sparks, let it get
on skin, or breathe vapors.
• Do: Use in well-ventilated area, close
containers when not using. Wear acid-type
safety goggles, rubber gloves, and rubber
apron.
• If it contacts skin or eyes, wash affected
areas with running water. Get medical help
at once.
• If you experience any breathing problems,
get to fresh air at once.
