AkzoNobel XS420 HARDENER (5-LITRE-CAN)

Additional Product Information

Overview

This three-component, high-solid polyurethane topcoat is engineered for aircraft structural protection and exterior aerospace surfaces. Designed for use in OEM production and MRO environments, it delivers high chemical resistance, excellent gloss retention, and long-term durability under harsh operational conditions. Aviation maintenance teams rely on this coating system for its compliance with major aerospace specifications, efficient curing cycles, and compatibility with approved epoxy primers for corrosion protection.

Key Technical Specs for TOPCOAT XS420

• Type: Three-component polyurethane high-solid topcoat
• Mix Ratio (by weight): Base 100 : Hardener 26 : Thinner 20
• Mix Ratio (by volume): 3 : 1 : 1
• Available Colors: Aerospace tints including White, Grey, Black, Red, Yellow
• Gloss Level: >85 GU at 60° (Black/Red/Yellow); >90 GU at 60° (White/Grey)
• Theoretical Coverage: 13 m²/L (529 ft²/gal) at 40 µm (1.6 mil) DFT
• Dry Film Thickness: 20–60 µm (0.8–2.4 mil)
• Wet Film Thickness: 45–120 µm (1.8–4.7 mil)
• Viscosity (ISO 4 cup): 21–23 sec at 18–30°C (64–86°F)
• Pot Life: 3 hrs (Thinner 713); 1 hr (Thinner 713-2)
• VOC: 420 g/L (3.5 lb/gal)
• Fully Cured: 7 days at 23°C (73°F); 3 days with 713-2 thinner
• Service Temperature: Suitable for aerospace operational temperature ranges up to 100°C (212°F) during curing cycles
• Typical Uses: Aircraft structural components, landing gear structures, treated aluminium and steel assemblies
• Shelf Life: 18 months (base & hardener); 48 months (thinner) stored at 5–35°C (41–95°F)

Approvals & Specifications

• Qualified to Messier-Bugatti-Dowty IFC30-125-06
• Qualified to Aircelle HMRC0150A
• VOC compliant per ISO 11890-1 and ASTM D3960
• Designed for use with chromate-free corrosion resistant primer systems

Typical Aircraft MRO / AOG Applications

• Aircraft external structural panels
• Landing gear assemblies and structural components
• Aluminium alloy and treated steel parts
• Touch-up and localized structural refinishing
• OEM production and heavy maintenance repaint cycles

Compatibility & Safety Notes

• Designed for metallic substrates including aluminium alloys and steel
• Apply over approved epoxy primers for corrosion protection
• Recommended surface treatments: anodisation or conversion coating
• Application temperature: 15–35°C (59–95°F)
• Relative humidity: 30–85%
• Use appropriate PPE including gloves, respirator, and eye protection
• Consult Safety Data Sheet prior to handling

Packaging & Procurement

• Base available in 3 L containers
• Hardener available in 1 L and 5 L containers
• Thinner 713 and 713-2 available in 1 L and 5 L
• 40 mL Touch-Up Kits available (30 mL base + 10 mL hardener)
• Store sealed in original packaging between 5–35°C (41–95°F)
• Ideal for both production spray operations and field repairs

Why TOPCOAT XS420 is Chosen for AOG / MRO

• High chemical resistance for demanding aerospace environments
• Excellent gloss retention and appearance quality
• Flexible spray and brush application options
• Fast controlled curing cycles for reduced downtime
• Available touch-up kits for rapid AOG response
• Qualified to major aerospace OEM specifications

Practical Suggestions for Your Team (AOG Mindset)

• Stock both standard thinner and fast thinner options for varied curing needs
• Maintain controlled storage temperatures to preserve shelf life
• Pre-condition materials at 18–25°C (64–77°F) before mixing
• Train technicians on proper viscosity adjustment for compliant spray application
• Keep touch-up kits available for rapid structural repairs

Manufacture / Aviation Spec Codes

• Manufacturer: Mapaero (AkzoNobel Aerospace Coatings)
• Product ID: XS420
• Associated Primer: SP350 (chromate-free system)
• OEM Qualification: Messier-Bugatti-Dowty IFC30-125-06
• OEM Qualification: Aircelle HMRC0150A

Alternative Names & Descriptions

• XS420 Polyurethane Aircraft Topcoat
• High-Solid Aerospace Structural Topcoat
• XS420 Aircraft Exterior Coating System
• Mapaero XS420 PU Topcoat
• Aircraft Structure Protective Polyurethane Finish