This specification covers silicone alkyd and polysiloxane coatings that are designed to resist environmental effects and retain color and gloss over time on Navy ships. Coatings of types II through IV are intended for use as marking/contrast paints on topside surfaces, as well as for color-coding piping systems. Coatings of types V through VI are primarily intended to provide a highly durable, topside exterior coating that is color-stable and can be easily cleaned. Type V and VI coatings contain pigments with high near-infrared reflectance that are not appreciably degraded by exposure to ultraviolet light. All coatings covered by this specification are non-lead-, nonchromate-, and non-asbestos-containing materials. These coatings have been formulated to comply with air pollution regulations that allow a maximum VOC content of 250 grams of solvent minus water per liter of paint (2.08 lb/gal) as delivered and to comply with California regulations that allow a maximum VOC of 100 g/L. MIL-PRF-24635, type II coatings may be used where maximum VOC content limits are allowed to exceed 250 g/L but may not exceed 340 g/L. These products are not to be thinned. The coatings may be applied with brushes, rollers, or spray to bare steel and aluminum substrates, or to substrates that have previously been coated with the same product type or anti-corrosive primers conforming to MIL-PRF-23236 or MIL-DTL-24441. MIL-PRF-24635, types II through IV coatings may not be applied over MIL-PRF-24635 types V through VI coatings.