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MIL-PRF-16173 is a military specification that outlines requirements for corrosion-preventive compounds (CPCs) used to protect metallic surfaces from corrosion. The specification covers various types of CPCs, including water-displacing, water-displacing and penetrating, and solvent-cutback types. These compounds are typically applied to metal surfaces by spraying, brushing, or dipping.

MIL-PRF-16173 specifies the performance requirements, testing methods, packaging, and labeling for corrosion-preventive compounds. It ensures that these compounds meet stringent military standards for protecting critical metal components and equipment from corrosion in a variety of environments, including storage, shipment, and operational conditions.

MIL-PRF-16173 Product List

These products either meet or are approved to the MIL-PRF-16173 specification. Please consult the product page and product description for the specific grade/size you intend to purchase to ensure it will be supplied with MIL-PRF-16173 paperwork.

No Stock - Standard lead time 38 business days
£534.97 excl VAT
No Stock - Standard lead time 87 business days
£943.50 excl VAT
No Stock - Standard lead time 80 business days
£1942.35 excl VAT
In Stock
From £94.59 excl VAT
Silmid P/N: 
In Stock
From £11.84 excl VAT
In Stock
From £90.88 excl VAT
No Stock - Standard lead time 31 business days
From £190.32 excl VAT
Silmid P/N: 
In Stock
From £9.99 excl VAT
Silmid P/N: 
No Stock - Standard lead time 45 business days
From £395.81 excl VAT

Revisions, Versions and Grades

Revisions and Versions

  • MIL-PRF-16173E - The latest revision of the MIL-PRF-16173 specification. This was amended twice, once in 2006 and then again in 2017. E was first established in 1993
    MIL - Military Specification  PRF - Performance Requirements  16173 - unique identification number

  • MIL-C-16173D - An earlier version of the spec, established in 1966. Superceded in 1993 by revision E
    MIL - Military Specification  C - Corrosion Inhibitor  16173 - unique identification number


  • Grade 1 - presents a tough, black drying film ideal for external finished machine parts

  • Grade 2 - offers a soft, greasy film, providing undercover protection for metal surfaces on machines, instruments, and bearings

  • Grade 3 - consists of an oily film, functioning as a water-displacing coating for metal parts

  • Grade 4 - delivers a non-tacky, clear surface suitable for general-purpose indoor/outdoor protection, essential for handling, stacking, or counting