MIL-PRF-62218B
3.3.1.3 Weight per gallon. The weight per liter, expressed in grams per liter, shall be
established during testing. The weight per liter of any succeeding lot shall be within ± 5% of the
established value (4.6.5).
3.3.1.4 Sulfated ash content. The sulfated ash content, expressed as a percentage by
weight, shall be established during testing. When the established value is 0 to 0.5%, the sulfated
ash content of any succeeding lot shall be within ± 0.05 of the established value. When the
established value is 0.51% or higher, the sulfated ash content of any succeeding lot shall be within
± 10% of the established value (see 4.6.5).
3.3.2 Water content. The amount of water present in the compound shall be not greater
than 1% by weight (see 4.6.5).
3.3.3 Lead content. The amount of lead present in the nonvolatile portion of the
compound shall be not greater than 0.015% by weight (see 4.6.5).
3.3.4 Flash point. The flash point of the compound shall be not less than 38 degrees
Celsius (°C) (100 degrees Fahrenheit (°F)) (see 4.6.5).
3.3.5 Condition in container. The compound shall show no settling in a freshly opened,
full container. There shall be no evidence of lumps, skins, or separation of the solvent
(see 4.6.5.1).
3.3.6 Color. The color requirements specified herein apply to compounds that are
intended only for use on combat or tactical vehicles and trailers (see 4.3 and 6.2).
3.3.6.1 Type I. The compound shall be translucent or the color shall be brown
conforming to color chip 30051 of FED-STD-595 or black conforming to color chip 37038 of
FED-STD-595. Fluorescent pigments and dyes shall not be used (see 4.6.3).
3.3.6.2 Type II. The color shall be brown conforming to color chip 30051 of
FED-STD-595 or black conforming to color chip 37038 of FED-STD-595. Fluorescent pigments
and dyes shall not be used (see 4.6.3).
3.4 Performance.
3.4.1 Film characteristics.
3.4.1.1 Type I. When sprayed on a vertical surface in a single back and forth motion to
the manufacturer's designated wet film thickness, the compound shall produce a coating which is
continuous and uniform upon evaporation of the solvent. The dry film thickness over metal
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