MIL-PRF-81309F, PERFORMANCE SPECIFICATION: CORROSION PREVENTIVE COMPOUNDS, WATER DISPLACING, ULTRA-THIN FILM (16 MAY 2005) [SUPERSEDING MIL-C-81309E]., This specification covers the requirements for two types and two classes containing two grades of ultra-thin film, water displacing, corrosion preventive compounds which may be applied by dipping, spraying, brushing or by spraying from self-pressurized containers (see 6.1).