MIL-PRF-81733D
TABLE III. Application time.
Minimum
Minimum
Minimum
Minimum
Time,
Time,
Time,
Time,
Type I
hours
Type II
hours
Type III
hours
Type IV
hours
-1/61
-42
1/6
4
-1/42
1/4
-1/4
1/4
-1
1
-12
12
-1/2
1/2
-1/2
1/2
-24
24
-2
2
-2
2
-40
40
-4
4
-48
48
1
Class 1 only.
2
Class 2 only.
TABLE IV. Tack-free time.
Type
Time, hours
Type
Time, hours
Type
Time, hours
I
Class 1
Class 2
II
Class 1
Class 2
III
Class 1
Class 2
-1/6
4
-1/4
-
4
-1/4
8
1
-1
8
8
-1/2
16
8
-1/2
16
2
-2
24
16
-2
24
12
-4
24
3.3.1.7 Assembly time (Type IV only). The sealant shall squeeze out to a thickness no
greater than 0.005 inch at the bolts when tested as specified in 4.8.6.
3.3.2 Properties after cure. Unless otherwise specified, all test specimens shall be cured as
specified in 4.7.
3.3.2.1 Hardness. When tested as specified in 4.8.7, the Shore A-2 hardness of the cured
sealing compound shall be not less than 35 for Types I, II, and III or 30 for Type IV.
3.3.2.2 Specific gravity. When tested as specified in 4.8.8, the specific gravity of the cured
sealing compound shall be not greater than 1.65 for Class 1 or 1.50 for Class 2.
3.3.2.3 Corrosion. When tested as specified in 4.8.9, the cured sealing compound shall not
in itself induce corrosion and shall protect the substrate metal. There shall be no visible evidence
of corrosion at the metal-sealant interface.
8
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