MIL-DTL-82633A (OS)
3.1.3 Workmanship. The individual components shall contain no volatiles or toluene diisocyanate
ingredient and shall be products of high quality, suitable for the purpose intended, and so manufactured as
to meet all requirements specified herein. Both components furnished under this specification shall be
uniform in quality and consistency after stirring and free of agglomerates or other contaminants. The
cured compound shall be free of low or high density areas and shall present an appearance of smooth
homogeneity.
3.1.4 Storage (shelf) life. The cured compound (see 6.4.1) shall meet all requirements of this
specification when produced from components that have been stored in unopened original containers no
longer than 8 months at ambient temperature.
3.2 Product characteristics.
3.2.1 Physical properties of components. The components shall have the physical properties
specified in Table I.
TABLE I. Component physical properties.
Property
Component A
Component B
Test procedure
Specific gravity
0.91 ± 0.03
0.96 ± 0.03
4.4.1
1
Viscosity, cp (at 75 ± 5 ºF)
7,200 max.
12,000 max.
4.4.2
Flash point, ºF
500 min.
400 min.
4.4.3
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Not to exceed 25,000 cp after 8 months of storage.
3.2.2 Exothermic temperature. The peak exothermic temperature of the reacting polymeric
compound shall not exceed 100 degrees Fahrenheit (°F) when tested in accordance with 4.4.4.
3.2.3 Gel time. The gelation (reaction) time of the reacting components shall be 6 ± 1 ½ minutes
when tested in accordance with 4.4.5.
3.2.4 Slump test. The gelled compound (see 6.4.2) shall not slump beyond the edge of the test
container when tested in accordance with 4.4.6.
3.2.5 Alkalinity. The cured compound shall have a pH value of 7.0 or less when tested in
accordance with 4.4.7.
3.2.6 Acidity. The cured compound shall have less than 0.01 percent acidity when tested in
accordance with 4.4.8.
3.2.7 Stability. The cured compound shall show no evidence of oil or other materials leaching out
when tested in accordance with 4.4.9.
3.3 Performance requirements.
3.3.1 Resistance to cold temperature. A disc of the cured compound shall not crack, chip, or show
deterioration when tested in accordance with 4.4.10.
3.3.2 Compression set. The cured compound shall have a compression set no greater than 50
percent when conditioned at 160 ºF and no greater than 2 percent when conditioned at -65 ºF and tested in
accordance with 4.4.11.
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