TM 43-0139(2)Use. CARC is intended for use over new or previously painted surfaces. It is applied over pretreatedsurfaces after priming with an epoxy primer (MIL-P-53022, MIL-P-53030, or M IL-P-23377). CARC can be applied overthoroughly prepared existing CARC surfaces. It cannot be applied over lacquer. MIL-C-46168 is for exterior surfaces andinterior surfaces routinely exposed to the outside (i.e., door ramps, hatches, etc.).(3)Application. Pigments of Component A have a tendency to settle and cake due to the solids content. Thesesolids must be dispersed into a smooth, uniform solution prior to the addition of the catalyst. This can best beaccomplished by mechanically agitating or stirring Component A for 30 minutes before mixing. The catalyst, ComponentB, must be a clear to pale yellow liquid and must be free of crystals. A cloudy, milky, or crystalline gel indicates that thecatalyst is contaminated and should not be used. If the container for Component B is swollen, do not open it. Dispose of itas a hazardous waste. Both components should always be measured because accuracy is very important. MIL-C-46168should be mixed four parts by volume of Component A with one part by volume of Component B. Thinning should not benecessary for brush application. MIL-C-46168 can be thinned for spraying by mixing up to one part by volume of theapplicable solvent with four parts by volume of the mixed coating. The applicable solvent for Type II and Type IV is MIL-T-81772, Type I. For adequate camouflage properties, it is necessary to apply the coating to a minimum dry film thicknessof .0018 inch (.0046 cm). Under certain temperature and humidity conditions, for more even results, it may be advisable toapply two coats of a minimum thickness of .0009 inches (.0023 cm) each. Component B is water sensitive and cautionmust be taken to ensure water or high humidity does not come in contact with the coating. Mixed coating must be usedwithin eight hours and cannot be stored. Once opened, component B must be used that day or stored in a sealed dryair/airless container.(4)Drying Time. Curing time increases with lower temperature or higher humidity. At temperatures of 70 F(21°C) and above, MIL-C-46168 will dry within the specification requirements (set to touch in approximately 15 minutes,dries hard in 90 minutes, dries through in 4 hours, with a complete cure within 7 days). At 60°F (16°C), MIL-C-46168requires twice as long to cure.CAUTIONDo not mix components of MIL-C-46168 with MIL-C-53039.CAUTIONComponents of different colors are not interchangeable. Component A of one colormay not be used with Component B of another color. Components from differentmanufacturers may not be mixed.CAUTIONDo not use CARC on items which are flexible. Because of its rigidity, the finishmay crack when item is bent.CAUTIONSpray lines used with epoxy should not be used with polyurethanes withoutcomplete flushing or cleaning with solvents.NOTECARC application requires extremely clean surface preparation. Prior to painting,check cleanliness with the red litmus or water break tests.Change 3 2-11
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