NavGuard I

MIL-PRF-81309H Type I Qualified Corrosion Prevention Compound

Military-qualified corrosion protection with integrated mildew inhibitor for aircraft, naval and industrial applications.

NavGuard® I is a military-qualified, ultra-thin film Corrosion Prevention Compound (CPC) developed to provide long-lasting corrosion protection in environments where high humidity, salt exposure and biological growth present significant maintenance challenges.

Originally developed for the U.S. Navy, NavGuard® I combines advanced corrosion prevention with a synergistic mildew inhibitor that helps prevent the growth of fungi, mould and mildew within both the wet coating and the cured protective film. This unique combination makes NavGuard® I particularly suitable for enclosed aircraft structures, equipment compartments and other high-humidity environments where corrosion and microbial growth can occur simultaneously.

Its advanced polymeric CPC technology penetrates seams, lap joints and enclosed cavities before forming a durable, ultra-thin protective film that remains flexible throughout its service life without cracking, peeling or becoming brittle. Compared with conventional military-grade corrosion preventive compounds, the extended service life of NavGuard® I helps reduce maintenance intervals, minimise aircraft downtime and lower lifecycle costs.

Military Qualification

Qualified to MIL-PRF-81309H Type I

• M81309-C1 – Type I, Class 1
• M81309-C2 – Type I, Class 2

National Stock Number (NSN)

• 16 oz Aerosol – 8030-01-643-1872

Key Features

• Qualified to MIL-PRF-81309H Type I
• Integrated mildew inhibitor technology
• Advanced ultra-thin film corrosion protection
• Long-lasting polymeric CPC technology
• Excellent moisture displacement
• Outstanding penetration into enclosed structures
• High-performance multi-metal corrosion protection
• Helps reduce galvanic corrosion between dissimilar metals
• Flexible coating that will not crack, sag or peel
• Low-build treatment that does not interfere with inspections
• Low VOC formulation
• Free from waxes, silicones and heavy metals

Why Choose NavGuard® I?

NavGuard® I was specifically developed for military aircraft operating in extreme marine environments where corrosion and biological contamination can significantly increase maintenance requirements.

Its advanced polymeric coating technology provides extended corrosion protection while the integrated mildew inhibitor helps prevent fungal growth within the protective film. The result is a durable, low-build coating that protects aircraft structures without attracting dirt or adding significant weight, making it ideal for corrosion-prone internal airframe areas and enclosed compartments.

The extended service life of NavGuard® I helps reduce repeat CPC applications, supporting longer maintenance intervals and lower operating costs.

Typical Applications

Recommended for protecting:

• Aircraft fuselage interiors
• Airframe cavities
• Wing and tail structures
• Helicopters
• Naval aircraft
• Equipment bays
• Electrical and avionics compartments
• Military vehicles
• Naval vessels
• Industrial machinery
• CNC equipment
• Machine tools
• Metal components during storage and transport

Particularly suited for applications exposed to:

• High humidity
• Marine environments
• Salt spray
• Tropical climates
• Long-term storage
• Corrosion-prone enclosed structures

Proven Performance

NavGuard® I was developed in accordance with MIL-PRF-81309H and incorporates advanced polymeric CPC technology designed to provide significantly longer service life than conventional military corrosion preventive compounds.

According to Corrosion Technologies, laboratory testing demonstrated corrosion protection exceeding the minimum requirements of MIL-PRF-81309H, including extended neutral salt spray performance in accordance with ASTM B117. Comparative testing also indicated substantially improved protection of aluminium and steel when evaluated against conventional corrosion preventive compounds.

Trusted by Defence & Industry

NavGuard® I is designed for military aviation, naval fleets, commercial aviation, OEMs, MRO facilities and industrial maintenance professionals requiring military-qualified corrosion protection together with enhanced resistance to fungal and mildew growth in demanding operating environments.