Aircraft kc46 end item identification, surface pre-treatment ac-131 part name assigned by controlling agency, case contains 10-1.00 quart kits; two part kit; part a; physical state: liquid; color: colorless; odor: vinegar; ph: 3.5-4.0; flash point: >200.0 deg f closed cup; solubility in water: complete; volatile organic compounds: 7.3 g/l; part b; physical state: liquid; color: colorless; odor: slight odor; boiling point: 120.0 deg c at 2.0 mmhg; flash point: 135.0 deg c; autoignition temperature: 231.0 deg c; surface pre-treatment ac-131 is a high-performance, non-chromated, conversion coating for applications on aluminum, nickel, and titanium alloys; ac-131 pre-treatment is simply applied to surfaces either by brush, dip or spray pn at ambient drying conditions; induction time: 30.0 minutes; pot life: 24.0 hours after mixing; special features, item is faa certified reference number differentiating characteristics

A liquid composition, with or without pigment, consisting basically of a mixture of vegetable oil and animal oil or petroleum derivatives formulated for application or rusted areas to arrest further corrosion. One type dries hard and may be painted over where appearance is not a factor. Another type is for temporary use on a surface only until proper preparation and painting of the surface can ba accomplished. See also metal conditioning compound; corrosion preventive compound; coating compound, internal boiler surfaces and paints, varnishes, lacquers and enamels.