MIL-PRF-26915D
be washed in water (without scrubbing) and dried at room temperature. Corrosion shall not
extend more than 1/8 inch from the score line (see 3.5.9).
4.9.10 Accelerated weathering test. Panels shall be solvent-cleaned and coated with primer,
primer plus enamel and primer plus polyurethane. These panels shall be exposed for 300 hours of
accelerated weathering IAW ASTM G 23 and ASTM D 822. Following exposure, the panels
shall be inspected for loss of flexibility, blistering, loss of either intercoat or metal adhesion or any
other apparent defects. Slight whitening of the primer film shall be disregarded (see 3.5.10).
4.9.11 Condition in container evaluation. After the primer has been stored for one year at a
temperature of 75° ± 15°F, it shall be evaluated. Remove any continuous skin from the primer.
Then thoroughly stir the primer to examine for presence of gel bodies or visible agglomerates as it
flows from the spatula or paddle. Immediately after stirring, examine the surface of the material
for floating pigments. Flow some of the material on a panel, allow to drain, in a vertical position
and examine for loss of drying ability, drift, seeding, and coarse particle. Check for change in
viscosity per ASTM D 562 (see 3.5.11).
4.9.12 Storage stability evaluation. A kit of primer shall be stored for one year under conditions
IAW 4.9.11. At the end of the storage period, inspect the condition of the material for undesirable
qualities. Undesirable qualities shall include caking, curdling, agglomerates, coarse particles,
gelling, viscosity, settling, seeding, putrefaction, skinning, gas, livering, separation, and loss of
drying ability upon aging (see 3.5.12).
5. PACKAGING
5.1 General. For acquisition purposes, the packaging requirements shall be as specified in the
contract or order (see 6.2). When actual packaging of materiel is to be performed by DoD
personnel, these personnel need to contact the responsible packaging activity to ascertain requisite
packaging requirements. Packaging requirements are maintained by the Inventory Control Point
packaging activity within the Military Department or Defense Agency, or within the Military
Department's System Command. Packaging data retrieval is available from the managing Military
Department or Defense Agency automated packaging files, CD-ROM products, or by contacting
the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature which may be helpful, but is
not mandatory.)
6.1 Intended use. The primer is specified for use on steel surfaces intended for support
equipment and facilities structure. The primer is intended for use primarily with polyurethane
topcoat material. The primer is intended to provide appreciable galvanic protection to steel
substrate.
6.2 Acquisition requirements. Acquisition documents must specify the following:
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