MIL-PRF-24635E
Water content
Yes
No
Coarse particles
Yes
No
Consistency
Yes
Yes
Fineness of grind
Yes
Yes
Brushing properties
Yes
No
Rolling properties
Yes
No
Spraying properties
Yes
No
Sag resistance
Yes
Yes
Drying time
Yes
Yes
Contrast ratio
Yes
Yes
Color deviation
Yes
Yes
Gloss
Yes
Yes
Solar reflectance
Yes
Yes
Cross-cut adhesion
Yes
No
Overcoat adhesion
Yes
No
Flexibility
Yes
No
Water resistance
Yes
No
Accelerated weathering
Yes
No
Anti-stain
Yes
No
Long term exterior exposure
Yes
No
Recoat
Yes
No
Serviceability
Yes
No
4.2.1 Qualification sample. The qualification sample shall be drawn from a production batch and shall consist
of enough component materials (i.e., hardener and resin if a two component system) to create 4 liters (~1 gallon) of
the final mixed coating.
4.2.2 Formulation changes. Any change in basic ingredients or manufacturing processes (other than minor
changes in pigment concentrations strictly to adjust final coating system color) which would affect compliance with
this specification must be reported to both the contracting activity and NAVSEA. The Government reserves the
right to require that all tests specified in this specification be re-performed on a production batch of the coating
produced under the new formulation or process before any shipment is accepted. Any formulation change not
disclosed to NAVSEA will result in immediate disqualification of the product.
4.2.3 Extension of qualification. Testing and qualification of Grade C Low solar Absorbent (LSA and Anti-
Stain) products shall be automatically extended to Grades A and B. Testing and qualification of Grade B (LSA)
products shall be automatically extended to Grade A. Testing and qualification of one color variant of a given type,
class, and grade product shall be automatically extended to all other colors for the same product (type, class, and
grade), providing the only difference in the product formulations is in the color pigment concentrations.
4.3 Conformance inspection. Conformance inspection shall consist of specific tests identified in table V.
4.3.1 Lot. The addition of any substance that was not present in the qualification sample requires
requalification. For purposes of sampling and conformance inspection, a lot shall consist of all paint of the same
formula number from a single uniform batch or uniform blend of batches (for plural component coatings) offered for
delivery at one time. The addition of any substance to a batch shall constitute a new lot and full conformance testing
is required.
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