MIL-PRF-81309H Standard

What is MIL-PRF-81309H?

MIL-PRF-81309H is the most recent (revision H) performance specification for ultra-thin, film-forming compounds that repel water and resist corrosion. These compounds are designed for application on metal surfaces in both military and civilian aerospace sectors, ensuring reliable protection under demanding conditions.

Key Features of the MIL-PRF-81309H Standard

Multiple types and packaging options

The standard defines four types (Type I-IV) and two packaging classes-Class 1 for bulk supply and Class 2 for self-pressurized spray - providing versatility to meet various protective and application requirements.

Superior protective properties

Products conforming to this standard must be water-repellent, non-staining, non-hardening, and simple to apply by spraying, brushing or dipping.

Wide application range 

Suitable for protecting metals during shipment, storage, or active service, with proven effectiveness in the harsh conditions of naval aviation environments.

Top Products Compliant with MIL-PRF-81309H 

TOP	Product Name	Product photo	Product Description
1	Krytox GPL 215		Krytox GPL 215 EP grease is used for high loads or slow speeds. The EP grease has high load carrying capacity and good lubricating properties under boundary and mixed friction conditions.
2	Krytox GPL 203		Krytox GPL 203 is polytetrafluoroethylene (PTFE), contains no additives and can be used on components exposed to chemicals.
3	Krytox XP 1A2		Krytox™ XP-1A2 oil will extend component and service life. The anti-corrosion properties of the additive will reduce rust, and allow for longer grease and service life.

Applications of MIL-PRF-81309H

Corrosion prevention for airframes and structural metals

Commonly used to safeguard aircraft surfaces rust during transportation and prolonged storage, offering short- to medium-term protection.

Protection for electrical and avionics systems

Type III formulations are particularly effective for safeguarding sensitive parts such as aircraft connectors, wiring, and avionics against moisture and corrosion.

Quick and convenient application

The self-pressurized (Class 2) format enables efficient coating in confined or hard-to-reach areas and can be applied directly on-site, shipyards to manufacturing facilities—making it ideal for routine maintenance operations.