MIL-PRF-85285 is a military specification detailing the requirements for a high-performance polyurethane coating designed for use on aircraft and aerospace equipment. This MIL-PRF-85285 specification outlines the standards the coating must meet to support durability, corrosion resistance, and reliable performance in demanding operating environments.
Quick selection guide for MIL-PRF-85285 Types and Classes
MIL-PRF-85285 Type and Class are selected based on the application and formulation requirements. Type is commonly used to distinguish aircraft versus support equipment use and applicable VOC thresholds, while Class identifies the formulation category. If project or maintenance documentation specifies a required combination, match the correct Type and Class to the product Technical Data Sheet before ordering. For programs that require the most current revision, confirm the coating system meets MIL-PRF-85285F requirements.
MIL-PRF-85285 Revisions and Versions
MIL-PRF-85285A: The first revision, made in July 1987
MIL-PRF-85285B: This revision had 2 further amendments in 1988 and 1989
MIL-PRF-85285C: This is one of the earlier version of the specification, established in 1997. It was superseded in 2002 by MIL-PRF-85285D
MIL-PRF-85285D: This version had three further amendments in 2006 and 2007 and 2009. It was superseded in 2012 by MIL-PRF-85285E
MIL-PRF-85285E: Established in 2012 but superseded by the more recent version F in 2022
MIL-PRF-85285F: This is the most recent revision of the spec, established in May 2022
MIL-PRF-85285 Further Information
Purpose: MIL-PRF-85285 establishes performance requirements for polyurethane coatings used on military aircraft and aerospace equipment, helping protect surfaces from corrosion, weathering, and other environmental hazards.
Properties: The specification defines physical, chemical, and mechanical requirements, including adhesion strength, flexibility, impact resistance, hardness, and resistance to chemicals and solvents.
Compliance: Coatings that meet MIL-PRF-85285 requirements may be used in military applications, with evidence of compliance, typically supported by testing and certification documentation.
Industry Impact: Although MIL-PRF-85285 is a military specification, many commercial aerospace manufacturers and suppliers also follow these standards to support consistent quality and performance.
MIL-PRF-85285 is often specified as part of a complete aerospace coating system. Related specifications, such as the MIL-PRF-85582 aerospace primer specification and the MIL-PRF-23377 epoxy primer specification, may also be referenced depending on surface preparation and performance requirements.
Frequently Asked Questions About MIL-PRF-85285
What is the mix ratio for MIL-PRF-85285 coatings, such as Type I Class H?
Mix ratio depends on the specific MIL-PRF-85285 coating system and manufacturer. Many products are supplied as multi-component kits (base plus catalyst), and the required mix ratio, induction time, and pot life are listed in the product Technical Data Sheet. Before ordering, confirm the exact mix requirements for the product selected from the MIL-PRF-85285 product list above. If documentation requires the latest revision, verify compliance to MIL-PRF-85285F.Where can I download the official MIL-PRF-85285 specification, including older revisions like MIL-PRF-85285C?
Official MIL specifications are typically accessed through approved government or program documentation sources. For purchasing, use Silmid’s MIL-PRF-85285 product list above and confirm Type, Class, and revision requirements in the product Technical Data Sheet. For programs requiring the most current revision, confirm compliance to MIL-PRF-85285F.How do I choose the correct MIL-PRF-85285 Type and Class when ordering?
Selection should be based on project or maintenance documentation. MIL-PRF-85285 Types are commonly used to distinguish aircraft versus support equipment applications and applicable VOC limits, while Classes identify the formulation category. When ordering from Silmid’s MIL-PRF-85285 product list above, verify the Type, Class, and revision alignment in the product Technical Data Sheet. For programs specifying the latest revision, confirm the product meets MIL-PRF-85285F requirements.
