MIL-PRF-8516G
and shall meet the application time requirements (see 3.3.1.3.2), the set time requirements (see
table I), and cure A hardness requirements (see table I).
3.3.1.6 Long-term storage. When tested in accordance with 4.9.2.12, the mixed category A
sealing compound shall meet the requirements of application life (see 3.3.1.3) and cure A and B
hardness (see table I).
3.3.2 Properties after cure. Unless otherwise specified in the test method, all test specimens
shall be cured as specified in 4.7.
3.3.2.1 Nonelectric properties. The nonelectric properties of the cured sealing compound
shall be as specified in table I.
TABLE I. Nonelectric properties of cured compound.
Property
Requirement 1/
Test
Cure A (4.7.1)
Cure B (4.7.2)
paragraph
Set time
No sag or flow
No sag or flow
4.9.2.3
Shrinkage, percent, maximum
10
10
4.9.2.4
Hardness, Shore A-2 initial,
Type I - 20, minimum
Type I - 30 to 60
4.9.2.5
points
Type II - 25, minimum
Type II - 30 to 60
Adhesion, (piw), minimum
4.9.2.6
Aluminum alloy
2
15
Chromated cadmium plated steel
2
15
Diallyl phthalate plastic
15
Nylon plastic
2
15
Polytetrafluoroethylene (PTFE),
2
treated
Fluid resistance
4.9.2.7
Adhesion after immersion,
10
pounds, minimum
Change in hardness, points,
±10
maximum
Low temperature flexibility
No checking, cracking, or
4.9.2.8
separation from test panel
Corrosion
No greater corrosion than
4.9.2.9
control wire
Hydrolytic stability, physical
+15
4.9.2.10
Change in hardness after
5
exposure, points
1/ Unless otherwise specified, the given value is for all types and classes. "" indicates no
requirement.
7
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