MIL-PRF-81309 is a military performance specification. MIL means military, PRF means performance requirements, and 81309 is the unique identification number. This MIL PRF 81309 specification outlines requirements for ultra-thin film, water-displacing corrosion preventive compounds (CPCs). The latest revision of this spec is MIL-PRF-81309F.
MIL-PRF-81309 corrosion preventive compounds are designed to protect metallic surfaces from corrosion. They are commonly used across aerospace, automotive, and marine environments where preventing rust and corrosion is critical. In military and aerospace applications, metal components are often exposed to harsh conditions such as moisture, salt spray, and industrial pollutants that can accelerate corrosion. View our full list of MIL-PRF-81309 products that conform to this specification below.
Qualification and verification. For procurement and quality assurance, MIL-PRF-81309 corrosion preventive compounds may be required to be qualified by the qualifying activity prior to contract award. Where applicable, buyers can verify conformance using manufacturer documentation and Qualified Products List (QPL) or Qualified Products Database (QPD) listings for the governing specification, along with the required type and class for the application. This MIL PRF 81309 verification step helps ensure the selected product matches contract requirements. Need help matching a product to your requirement? Contact our Technical Support team.
MIL-PRF-81309 Versions and Revisions
MIL-PRF-81309H. The most recent revision of MIL-PRF-81309. This MIL PRF 81309 specification was established in July 2018 and reviewed in July 2021, when an amendment was made.
MIL-PRF-81309G. Established in July 2014 for this MIL PRF 81309 specification.
MIL-PRF-81309F. Version E was superseded in May 2005 by Version F for this MIL PRF 81309 specification.
MIL-PRF-81309E. First established in March 1993. This MIL PRF 81309 version was amended in December 1993, July 1996, and November 1997.
MIL-PRF-81309 FAQs
What is MIL-PRF-81309?
MIL-PRF-81309 is a military performance specification for ultra-thin film, water-displacing corrosion preventive compounds (CPCs). This MIL PRF 81309 specification is commonly referenced for corrosion protection in aerospace and defence applications.
What is a water-displacing corrosion preventive compound (CPC)?
A CPC is a corrosion preventive compound designed to displace moisture and leave a thin protective film on metal surfaces to help reduce corrosion risk.
How do I confirm a product meets MIL-PRF-81309 requirements?
Confirm the required type and class for your application, then review the manufacturer’s conformance documentation. Where applicable, procurement programs may also reference qualification requirements such as QPL or QPD listings.
What is the difference between MIL-PRF-81309 Type II and MIL-PRF-81309 Type III?
Type II is generally considered a general-purpose soft film. Type III is typically described as an avionic grade soft film. Match the required type to your application requirements, then confirm on the product documentation.
What is the difference between Class I and Class II?
Class I is supplied in bulk containers for brush, dip, or spray application. Class II is supplied in aerosol or spray containers.
Do MIL-PRF-81309 products have NSNs for government procurement?
Some products may have an NSN assigned for government procurement. If an NSN is available, it is often listed on the product page under “NSN Reference” or can be confirmed by the manufacturer’s documentation.
Is there a MIL-PRF-81309 equivalent?
“Equivalent” usually means a
corrosion preventive compound that meets the same performance requirements and the required type and class for the application. Always confirm conformance documentation and any contract-specific qualification requirements.
