MIL-PRF-85285 Polyurethane Coating is an aerospace grade, multi-component chemically cured product that forms a film that is resistant to chemicals, solvents and abrasion. This coating has excellent adhesion to most substrates and is recommended for heavy duty industrial applications where a tough, resilient finish is required. The combination of all properties of MIL-PRF-85285 polyurethane aircraft paint coating (component, liquid, cured coating, resistance, mixing, application, cleanability, and strippability) along with the composition and solvent content provide the necessary requirements for a polyurethane coating used in the extremes of the naval aviation environment. There are no commercial equivalents that meet the combination of all properties of MIL-PRF-85285.
According to MIL-STD-2161, Department of Defense Standard Practice: Paint Schemes and Exterior Markings for U.S. Navy and Marine Corps Aircraft, MIL-PRF-85285 is the standard topcoat used on all U.S. Navy and Marine Corps aircraft: “Unless otherwise specified by the Program Manager of a specific aircraft, all U.S. Navy and Marine Corps aircraft shall be finished in accordance with MIL-STD-7179. The standard primer coating shall be MIL-PRF-23377 Type I or MIL-PRF-85582 Type I. Type II of both MIL-PRF-23377 and MIL-PRF-85582 is required when the use of tactical grays is specified. The standard topcoat shall be MIL-PRF-85285.” MIL-STD-7179 is the Department of Defense Standard Practice: Finishes, Coatings, and Sealants, for the Protection of Aerospace Weapons Systems.
MIL-PRF-85285, along with MIL-PRF-22750 (Epoxy Topcoat, High-Solids) is the primary coating used on U.S. Navy Aircraft, according to NAVAIR 01-1A-509-2, Cleaning and Corrosion Control, Volume II, Aircraft.
Additionally, MIL-PRF-85285 is used on Air Force aircraft as a primary topcoat, according to NAVAIR 01-1A-509-5, Cleaning and Corrosion Control, Volume V, Consumable Materials and Equipment for Avionics (NAVAIR 01-1A-509-5 dated 01 July 2009, is only intended for use by the Air Force. Navy organizations are not required to maintain a copy) and Air Force Technical Manual TO 1-1-691, Cleaning and Corrosion Prevention and Control, Aerospace and Non-Aerospace Equipment.