Akzonobel - Formerly Mapaero XS420-M(16827000B003L)(3-LITRE-CAN)

TOPCOAT XS420

Overview

Mapaero TOPCOAT XS420 is a three-component, high-solids polyurethane aircraft topcoat designed for structural and external aerospace applications. It offers excellent chemical resistance, durability and high-gloss finish retention. XS420 is recommended for use over Mapaero SP350 chromate-free epoxy primer to provide long-term protection of metallic aircraft structures.

Key Technical Specs

• Product Type: Three-component polyurethane aircraft topcoat
• Components: Base XS420 / Hardener XS420 / Thinner 713 or 713-2
• Mix Ratio (Weight): 100 : 26 : 20 (Base : Hardener : Thinner)
• Mix Ratio (Volume): 3 : 1 : 1 (Base : Hardener : Thinner)
• Theoretical Coverage: 13 m²/L for 40 µm dry film thickness
• VOC Content: 420 g/L
• Dry Film Weight: 1.5
• Gloss Level: >85 GU at 60° (Black, Red & Yellow) / >90 GU at 60° (White & Grey)
• Recommended Dry Film Thickness: 20µm to 60µm
• Pot Life: 3 hours (Thinner 713) / 1 hour (Thinner 713-2)
• Induction Time: None

Approvals & Specifications

• Qualified to Messier-Bugatti-Dowty IFC30-125-06
• Qualified to Aircelle HMRC0150A
• Designed for use with Mapaero SP350 chromate-free corrosion resistant primer

Typical Applications

• Aircraft structural coatings
• Aircraft exterior metallic components
• Steel and aluminium aircraft structures
• Commercial and military aerospace applications
• OEM production and aircraft MRO repainting

Surface Preparation & Compatibility

• Suitable for steel and aluminium substrates with approved surface treatments
• Apply over anodised or conversion-coated substrates
• Designed for application over epoxy primers such as Mapaero SP350
• Ensure primer preparation complies with SP350 Technical Data Sheet requirements

Mixing & Application

• Mixing Ratio by Weight: Base 100 / Hardener 26 / Thinner 20
• Mixing Ratio by Volume: Base 3 V / Hardener 1 V / Thinner 1 V
• Store components between 18°C and 25°C for 24 hours before use
• Mix XS420 base for 5 minutes before adding hardener and thinner
• Preparation Temperature: 15°C to 35°C
• Spray application requires no induction time

Brush Application

• Mixing Ratio by Volume: Base 3 V / Hardener 1 V
• Activate hardener using integrated touch-up kit cap
• Shake for approximately 1 minute before use
• If required, stir manually until homogeneous
• Do not reseal touch-up kit after activation
• Pot Life: 3 hours

Application Equipment

• Gravity compressed air spray gun
• Nozzle Size: 1.3 mm to 1.8 mm
• Application Temperature: 15°C to 35°C
• Relative Humidity: 30% to 85%
• Use clean, dry, oil-free compressed air

Spray Parameters

• Viscosity (18°C–30°C): CA4 Cup 23 ±5 seconds / ISO4 Cup 38 ±5 seconds
• Viscosity (30°C–35°C): CA4 Cup 21 ±5 seconds / ISO4 Cup 35 ±5 seconds
• Recommended Dry Film Thickness: 20µm to 60µm
• Wet Film Thickness: 45µm to 120µm
• Apply multiple coats depending on required film build

Drying & Curing

• Using Thinner 713
• Dry to Touch: 8 hours at 23°C / 45–60 minutes at 80°C
• Dry to Handle: 10–12 hours at 23°C
• Dry to Tape: 16 hours at 23°C
• Fully Cured: 7 days at ambient or 4 hours at 100°C
• Desolvation Time: 1 to 1.5 hours
• Using Thinner 713-2
• Dry to Touch: 4 hours at 23°C
• Dry to Handle: 4.5 to 5.5 hours at 23°C
• Dry to Tape: 6.5 to 7.5 hours at 23°C
• Fully Cured: 3 days at ambient or 3 hours at 80°C

Cleaning & Maintenance

• Clean equipment using Mapaero D713 cleaning thinner
• Ensure spray equipment remains clean and contamination free

Packaging & Storage

• Base XS420: 3 L
• Hardener XS420: 1 L and 5 L
• Thinner D713: 1 L and 5 L
• Thinner D713-2: 1 L and 5 L
• Touch-Up Kit: 40 mL (30 mL Base + 10 mL Hardener)
• Shelf Life: 18 months (Base & Hardener)
• Shelf Life: 48 months (Thinners)
• Storage Temperature: 5°C to 35°C

Why This Product is Chosen for AOG / MRO

• Excellent chemical resistance for aircraft structural components
• High-solids formulation reduces VOC emissions while maintaining performance
• Compatible with approved chromate-free primer systems
• Available in both standard and fast thinner options for flexible maintenance schedules
• Touch-up kits simplify on-aircraft repairs

Practical Suggestions for Your Team (AOG Mindset)

• Condition materials between 18°C and 25°C before mixing
• Mix base thoroughly before adding hardener and thinner
• Select Thinner 713 or 713-2 depending on required working time
• Observe flash-off periods before oven curing
• Apply multiple light coats to achieve correct film build
• Clean spray equipment immediately after use with D713 thinner
• Use only clean, dry, oil-free compressed air during application

Manufacturer / Aviation Spec Codes

• Product Name: TOPCOAT XS420
• Product Type: Three-component polyurethane aircraft structural topcoat
• Compatible Primer: SP350 Chromate-Free Epoxy Primer
• Specifications: Messier-Bugatti-Dowty IFC30-125-06, Aircelle HMRC0150A
• Application: Aircraft structural and exterior protective coating