Type II, class 1
MIL-PRF-81309 Type II, class 1:
This compound is intended for use on moving parts where
some lubrication is required, such as hinges, bomb racks, and sliding parts.
The ultra-thin film, corrosion preventive compound covered by this
specification is intended for use on any metal surface. It can be used both for
initial protection during shipment and storage and for in-service treatment.
MIL-PRF-81309 should not be used
around liquid oxygen fittings. The ability of this material to prevent corrosion and to displace water and its ease of application when packaged as class 2 (self-pressurized containers) make
it particularly suited for service use.
The combination of properties of MIL-PRF-81309 provide
the necessary requirements for a corrosion preventing compound for use in the extreme naval aviation environment.
MIL-PRF-81309 is intended for indoor protection and short term
protection outdoors where surfaces can be recoated when required. This material is not intended as a
substitute for other corrosion preventatives specified for protection of surfaces for periods
of more than one month.