PPG 54212921-RDA0 (1-Ltr-Tin)

5421/2921 Anti-Static Kit Type I

Overview

5421/2921 Anti-Static Kit Type I is a two-component polyurethane anti-static primer developed by PPG Aerospace to dissipate electrostatic charges from composite aircraft structures to the metallic airframe. Designed for application to non-conductive substrates such as glass fibre, aramid fibre laminates and engineering plastics, it provides excellent electrical conductivity, flexibility and water resistance. The coating is primarily intended for aircraft fairings and composite structures, but is not suitable for radomes or antenna applications.

Key Technical Specs

• Product Type: Two-component polyurethane anti-static primer
• Colour: Black
• Mix Ratio (by Volume): 5 Parts 5421/2921 Base : 1 Part 0707/9000 Activator : 2 Parts 0491/9000 Thinner
• Electrical Resistivity: <50 k?
• Pot Life: 2 hours at 21-25°C
• Recommended Dry Film Thickness: 40-50 microns (1.6-2.0 mil)
• Theoretical Coverage: 5-6 m�/L at 45 micron DFT
• Dry Film Density: 1.33 g/cm�
• VOC (Ready for Use): 680 g/L
• Application Temperature: 15-30°C
• Relative Humidity: 30-80%
• Shelf Life:
  • 5421/2921 Base - 24 months
  • 0707/9000 Activator - 24 months
  • 0491/9000 Thinner - 10 years

Approvals & Specifications

• Qualified to Airbus AIMS 04-04-005
• Compatible with Airbus AIMS 04-04-002
• Compatible with Airbus AIMS 04-04-011
• Compatible with BS2X34A+B coating systems

Typical Applications

• Aircraft composite fairings
• Glass fibre reinforced composite structures
• Aramid fibre composite components
• Plastic aircraft panels requiring electrostatic dissipation
• Composite exterior structures prior to topcoat application
• Commercial and military aerospace composite MRO

Compatibility & Safety Notes

• Apply over correctly prepared primer/surfacer systems
• Clean surfaces using DeSoto® CN20 or Desoclean™ 45 solvent cleaners before application
• Not suitable for radomes or antenna structures
• Allow all components to stabilise between 15°C and 30°C for at least 24 hours before mixing
• Clean spray equipment immediately after use using DeSoto® CN20, CN44 or Desoclean™ 45 solvent cleaners
• Read the Safety Data Sheet (SDS) before handling and avoid overexposure

Packaging & Procurement

• 5421/2921 Base Component
• 0707/9000 Activator
• 0491/9000 Thinner
• Supplied as a complete three-component anti-static primer system

Why This Product is Chosen for AOG / MRO

• Provides reliable electrostatic discharge protection for composite aircraft structures
• Excellent compatibility with common aerospace composite materials
• Good flexibility reduces the risk of coating damage on composite substrates
• Qualified to Airbus anti-static coating requirements
• Compatible with major aerospace primer and topcoat systems
• Simple spray application using conventional equipment

Practical Suggestions for Your Team (AOG Mindset)

• Maintain the specified 5:1:2 mixing ratio to achieve the required conductivity
• Apply light cross coats to achieve the recommended 40-50 micron dry film thickness
• Observe the 20-minute flash-off before curing or overcoating
• Ensure composite substrates are fully prepared and solvent cleaned before application
• Do not specify this product for radomes or antenna structures where RF transparency is required
• Store unopened materials between 5°C and 35°C to maximise shelf life

Manufacturer / Aviation Spec Codes

• Manufacturer: PPG Aerospace
• Product Name: 5421/2921 Anti-Static Kit Type I
• Product Type: Two-component polyurethane anti-static primer
• Mix Components: 5421/2921 Base + 0707/9000 Activator + 0491/9000 Thinner
• Primary Specification: Airbus AIMS 04-04-005
• Primary Application: Electrostatic discharge coating for composite aircraft fairings and structures