AERODUR HS 2121 CF PRIMER (5-Ltr)

Additional Product Information

Overview

Aerodur HS 2121 CF Primer is a three-component, chromate-free, low VOC aerospace epoxy primer designed for exterior aircraft coating systems and maintenance repair operations. Developed by AkzoNobel Aerospace Coatings, it is widely used in MRO and surface refresh applications where high adhesion strength, corrosion resistance, and chemical protection are required. Aviation teams rely on this primer for its compatibility with Airbus exterior coating specifications and selective strippable intermediate systems.

Key Technical Specs for Aerodur HS 2121 CF Primer

• Type: 3-component amine-cured epoxy primer
• Color: Beige and off-white variants
• Viscosity (Spray Ready, 23°C / 73°F): 18–30 seconds ISO Cup #4 (12–16 seconds Gardner Zahn Cup #2)
• Pot Life: Approximately 2 hours at 23°C / 73°F
• Cure / Working Time: Dry-to-tape ~3 hours; Dry-to-sand ~4 hours
• Service Temperature: Depends on full coating stack system
• Typical Uses: Aircraft exterior structural protection, refresh primer repair, fastener and rivet coating, MRO repaint preparation
• Dry Film Thickness: 15–25 µm (0.6–1.0 mil)
• Volatile Organic Compounds: Maximum 350 g/L (2.95 lb/gal)

Approvals & Specifications

• Airbus AIMS 04-04-031
• Airbus AIMS 04-04-032
• Airbus AIMS 04-04-033
• Airbus AIMS 04-04-034
• Airbus AIMS 04-04-037

Typical Aircraft MRO / AOG Applications

• Fuselage exterior surface protection and repaint preparation
• Rivet, fastener, and joint corrosion barrier coating
• Refresh primer layer during aircraft maintenance cycles
• Reactivation of aged epoxy or polyurethane coating systems
• Application on OEM-approved pretreated metal surfaces

Compatibility & Safety Notes

• Compatible with sol-gel treated substrates including OEM-approved 10PEG1-type surfaces
• Suitable for uncoated metals, aged coating systems, and reactivated primers
• Surface must be cleaned using approved solvent cleaners prior to sanding and application
• Use appropriate PPE including respiratory, eye, and skin protection during mixing and spraying
• Comply with local transportation, environmental, and workplace safety regulations

Packaging & Procurement

• Supplied as a three-component coating system (base material, hardener 6040, activator A9026)
• Designed for controlled mixing by volume or weight ratios (5:1:1 by volume)
• Store in original unopened containers under dry conditions
• Recommended storage temperature: 5–35°C (40–95°F)

Why Aerodur HS 2121 CF Primer is Chosen for AOG / MRO

• Fast processing window supports rapid aircraft return-to-service requirements
• Excellent adhesion on treated and aged aerospace surfaces
• High chemical resistance against hydraulic and operational fluids
• Low VOC chromate-free formulation supports environmental compliance
• Flexible spray application using multiple equipment types

Practical Suggestions for Your Team (AOG Mindset)

• Keep test panels when deploying new spray equipment setups
• Allow components to acclimatize to ambient temperature before mixing
• Maintain recommended application environment of 20–25°C (68–77°F) and 20–60% RH whenever possible
• Monitor pot life during high-volume maintenance operations
• Clean equipment immediately after use with approved solvents

Manufacture / Aviation Spec Codes

• Manufacturer: AkzoNobel Aerospace Coatings
• Product Group: Aerospace Epoxy Primer
• Qualification Standards: Airbus AIMS Exterior Coating Specifications

Alternative Names & Descriptions

• Aerodur HS 2121 CF Aerospace Primer
• Chromate-Free Aircraft Epoxy Primer HS 2121
• High Solids Aerospace Exterior Primer 2121
• Airbus Exterior Refresh Epoxy Primer
• A9026 Activated CF Epoxy Aircraft Primer