3-5. CORROSION INHIBITIVE SEALING AND COATING COMPOUND REMOVAL, APPLICATION,
AND CURING (cont)
FREON TMS OR TMS PLUS
Toxic, irritating. Can cause breathing
problems, eye damage.
Dont: Let it get on skin, breathe vapors, or
use near flames or sparks.
Do: Use in well-ventilated area, close
containers when not using. Wear acid-type
safety goggles, rubber gloves, and rubber
If it contacts skin or eyes, wash affected
areas with running water. Get medical help
If you experience any breathing problems,
get to fresh air at once.
1. Remove uncured compound with cloth and
acetone or toluene.
2. Remove cured compound by one or more of
the methods listed below.
a. Use a knife, cut or scrape away compound:
(1) to permit loosening or removing
(2) from all other surfaces after removing
attaching hardware and attached item.
(3) wipe surfaces with cloth and toluene
after removing compound.
b. Soak in dichloromethane until bondline
swells (about 2 hours); then remove as in
step a above.
c. Brush or swab with dichloromethane. Keep
compound wet until bondline swells; then
remove as in step a above.
Work life is 1 hour at 67 to 87°F (19.4 to
3. Let base and hardener containers stand for at
least 24 hours at 67 to 87°F (19.4 to 30.5°C).
4. Clean surfaces with cloth and freon TMS or
5. Mix curing agent in its container until it
becomes a uniform paste.
Two different types of corrosion inhibitive
sealing and coating compounds are used. If
using Proseal 870, go to step 6. If using PR-
1436-G, go to step 7.
6. Proseal 870: Mix 7 parts base to 1 part
hardener until color is uniform. Go to step 8.
7. PR-1436-G: Mix 12.5 parts base to 1 part
hardener until color is uniform.
8. Thoroughly mix and blend for 5 minutes
minimum. Do not allow air bubbles to form.
9. Use brush or small putty knife to apply
compound as follows:
a. Class 1A application (screws tightened
immediately upon installation) apply
compound to threads.
b. Class 1B application (screws tightened
after alinement) apply compound to heads
of tightened screws.