MIL-PRF-81352C
3. REQUIREMENTS
3.1 Qualification. Coatings furnished under this specification shall be products that are
authorized by the qualifying activity for listing on the applicable qualified products list before
contract award (see 4.3 and 6.3).
3.2 Toxicity. The coatings shall have no adverse effect on the health of personnel when
used for their intended purpose when evaluated in accordance with 4.6.8 (see 6.4). The coatings
shall contain no free isocyanates.
3.3 Composition. The coatings shall be a one component composition and shall not contain
chromium, when tested in accordance with ASTM-D3718, nor cadmium, cadmium compounds,
or more than 0.06 percent by weight of lead metal or lead compounds, when tested in accordance
with ASTM-D3335 (see 4.6).
3.3.1 Volatile organic compound (VOC) content. When mixed in accordance with the
manufacturer's instructions to achieve the application viscosity specified in 3.5.4, the VOC
content of the coatings shall be not greater than 340 g/l (2.837 lbs/gal), when tested in accordance
with ASTM-D3960 (see 4.6). Halogenated solvents, except for parachlorofluoromethylbenzene
or equivalent as determined by the qualifying activity, shall be prohibited in the formulation of
this product.
3.3.2 Thinner compatibility. The coatings shall be miscible in water or compatible with the
following solvents: type I and II coatings shall be compatible with MIL-T-81772, type III; and
type III coating shall be compatible with MIL-T-81772, type I.
3.4 Storage stability.
3.4.1 Extended storage stability. The coatings, as packaged by the manufacturer, shall meet
all the requirements of this specification. For metal containers the storage period shall be a
minimum of one year and for plastic containers the period shall be a minimum of six months
upon the receipt of material at the testing facility (see 4.6).
3.4.2 Accelerated storage stability. The coatings, as packaged by the manufacturer, shall
not develop increased internal container pressure when tested in accordance with 4.6.1. After
storage, the contained material shall be free of lumps, skins, gels, or particulate matter, either
suspended in solution or settled on the inner surface of the container. When stirred with a
paddle, the contained material shall be a smooth, homogenous mixture. When applied in
accordance with 4.5.2, the coating shall be a smooth, uniform film, free of grains, lumps and
streaks.
3.5 Physical properties.
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