AkzoNobel HARDENER 6040 (1-Ltr)

Additional Product Information

Overview

Aerodur HS 2121 CF Primer is a chromate-free, low-VOC, high-solids epoxy primer designed for aircraft exterior coating systems. Developed to meet Airbus exterior specifications, it is widely used in aviation maintenance, repair and overhaul (MRO) and repaint programs as a refresh primer. Teams rely on this coating for its strong adhesion to metals and aged coatings, chemical resistance, and compatibility with modern aerospace pretreatment technologies.

Key Technical Specs for Aerodur HS 2121 CF Primer

• Type: 3-component amine-cured epoxy primer
• Mix Ratio: 5:1:1 by volume (Base : Hardener 6040 : Activator A9026)
• Color: Beige and Off-White
• Viscosity: 18 30 sec ISO Cup #4; 12 16 sec Zahn Cup #2 at 23 C (73 F)
• Pot Life: 2 hours at 23 C (73 F)
• Dry Film Thickness: 15 25 m (0.6 1.0 mil)
• Dry to Tape: 3 hours at 23 C (73 F)
• Dry to Sand: 4 hours
• Recoat Window: Minimum 2 hours / Maximum 168 hours
• VOC Content: ?350 g/L (?2.95 lb/gal)
• Theoretical Coverage: 38 m /L (1557 ft /US gal) at 15 m
• Tensile / Peel Strength: Not applicable for coating system
• Shore Hardness: Not specified
• Recommended Application Conditions: 15 35 C (59 95 F), 35 75% RH

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
• Designed for selective strippable intermediate coat systems

Typical Aircraft MRO / AOG Applications

• Aircraft exterior repaint and refresh programs
• Adhesion layer for aged coating systems
• Priming rivets, fasteners and exposed metals
• Commercial and military aircraft fuselage coating systems
• Compatibility with sol-gel pre-treated surfaces

Compatibility & Safety Notes

• Compatible with OEM-approved sol-gel pretreatments (10PEG1 type)
• Suitable for use over cleaned and sanded epoxy or polyurethane finishes
• Use appropriate PPE and follow MSDS and local safety regulations
• Equipment cleaning recommended using Solvent Cleaning C 28/15 or 98068
• Test panels recommended before first application

Packaging & Procurement

• 3-component kit system: Base, Hardener 6040, Activator A9026
• Store between 5 35 C (41 95 F) in original unopened containers
• High solids formulation reduces application waste
• Designed for efficient spray application across large aircraft surfaces

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

• Fast drying and flexible recoat window supports rapid turnaround
• Chromate-free formulation supports sustainability and compliance goals
• Excellent adhesion across mixed substrates and aged coatings
• Reliable chemical resistance to hydraulic fluids and harsh environments
• Compatible with modern Airbus exterior coating systems

Practical Suggestions for Your Team (AOG Mindset)

• Stock full kit components to avoid mixing ratio delays during AOG events
• Train technicians on correct spray settings for consistent film build
• Maintain solvent cleaning supplies for rapid surface preparation
• Use beige or off-white variants strategically based on topcoat colour

Manufacture / Aviation Spec Codes

• Manufacturer: AkzoNobel Aerospace Coatings
• Product Type: Epoxy Primer Exterior Aerospace Coatings
• Specification Compliance: Airbus AIMS Exterior Coating Systems

Alternative Names & Descriptions

• Aerodur HS 2121 CF Epoxy Primer
• Chromate-Free Airbus Exterior Primer
• High Solids Aerospace Refresh Primer
• AkzoNobel Aerodur 2121 CF Primer System
• Airbus Qualified Epoxy Refresh Primer