Akzonobel - Formerly Mapaero FR4-45-SANDY-BEIGE(5.25-KG-KIT)

SURFACER FR4-45

Overview

SURFACER FR4-45 is a three-component, water-based polyurethane surfacer developed for aircraft cabin interiors. It is designed to fill and correct surface imperfections such as pinholes on composite and thermoplastic substrates prior to the application of approved fire-retardant topcoats including FR2-55, FR6-55, FRC and DI-TEX.

Key Technical Specs

• Product Type: Three-component water-based polyurethane surfacer
• Application: Aircraft cabin interior composite and thermoplastic substrates
• Components: Base FR4-45 / Hardener FR4-45 / Water (Thinner)
• Theoretical Coverage: 6 m²/kg for 50 µm DFT or 12 m²/kg for 25 µm DFT
• Dry Film Weight: 2
• VOC Content: 20 g/L (ISO 11890-1) / 40 g/L (ASTM D3960)
• Colours: Sandy Beige, Cream, Stone Grey
• Gloss Level: Matt (<10 GU at 60°)
• Flash Point: Base >100°C / Hardener >60°C
• Shelf Life: 12 months

Approvals & Specifications

• Airbus AIMS 04-08-001
• Airbus ABS5650 A
• Airbus CML 16-046
• Airbus CML-04-BAM6
• Boeing BMS 10-83 Type IX and Type IV
• FMS 5520 Class 2
• C&D Zodiac CDM240-00
• C&D Zodiac CDM240-01
• Bombardier DHMS C4.22
• Embraer MEP 10-132
• Embraer MEP 10-075
• Pilatus PMS0600-52-02
• Complies with JAR / FAR Part 25 §25.853 (a) + (c/d)

Typical Applications

• Aircraft cabin interior composite panels
• Thermoplastic interior components
• Surface defect filling prior to decorative topcoats
• Correction of pinholes and minor surface imperfections
• Preparation before fire-retardant polyurethane finishing systems

Surface Preparation

• Thermoplastics: Sand using P240–P400 abrasive paper
• Phenolic composites: Sand using P100–P180 abrasive paper
• Clean using lint-free cloth
• Use Isopropanol for thermoplastic or phenolic substrates
• Acetone or MEK may be used only on phenolic substrates
• Ensure surfaces are clean and dry before application

Mixing & Application

• Spray Mixing Ratio (Weight): Base 100 / Hardener 5 / Water 5–15
• Spray Mixing Ratio (Volume): Base 15 V / Hardener 1 V / Water 1.1 V–3.5 V
• Brush Mixing Ratio (Weight): Base 100 / Hardener 5 / Water 0–5
• Brush Mixing Ratio (Volume): Base 15 V / Hardener 1 V / Water 0–1.1 V
• Condition unmixed products between 18°C and 25°C for 24 hours before use
• Blend base using low-speed agitation (approximately 200 RPM)
• Recommended filter: 120–150 µm
• Induction Time: None

Application Equipment

• Gravity compressed air spray gun
• Nozzle Size: 1.6 mm to 2.2 mm
• Spray using dry, oil-free compressed air
• Brush application suitable using fine-hair brush

Application Parameters

• Application Temperature: 15°C to 35°C
• Relative Humidity: 20% to 80%
• Recommended Dry Film Thickness: 20–80 µm
• Wet Film Thickness: 50–190 µm
• Spray Pressure: 3 bar ±0.5 bar (44 psi ±7 psi)
• Pot Life (Spray): 3 hours (10% dilution)
• Pot Life (Brush): 45 minutes at 23°C
• Approx. 2 crossed coats for 80 µm DFT
• For thicker builds (>80 µm), allow 30-minute flash-off before second coat

Drying & Curing

• Dust Free: 30 minutes at 23°C
• Dry to Sand: 3 hours at 23°C
• Dry to Sand: 1 hour at 40°C
• Dry to Sand: 30 minutes at 60°C
• Dry to Sand: 15 minutes at 80°C
• Fully Cured: 7 days at 23°C
• Fully Cured: 3 days at 40°C
• Fully Cured: 12 hours at 60°C
• Fully Cured: 4 hours at 80°C
• Flash-off: 30 minutes to 1 hour before oven curing

Defect Correction

• Sand lightly using P240–P400 abrasive paper if defects occur
• Clean with lint-free cloth dampened with Isopropyl Alcohol
• Reapply FR4-45 or approved Mapaero water-based topcoat

Packaging & Storage

• Base FR4-45: 1 gallon, 1 kg and 5 kg
• Hardener FR4-45: 0.25 kg, 1 kg and 5 kg
• Storage Temperature: 5°C to 35°C
• Shelf Life: 12 months in sealed original packaging
• Not subject to IATA dangerous goods regulations for air transport

Why This Product is Chosen for AOG / MRO

• Fast-drying water-based surfacer for aircraft interiors
• Excellent filling properties for composite pinholes
• Very low VOC formulation
• Approved by major aircraft OEMs
• Compatible with multiple Mapaero cabin finishing systems
• Supports compliance with aircraft interior fire-retardancy requirements

Practical Suggestions for Your Team (AOG Mindset)

• Keep materials between 18°C and 25°C before mixing
• Always remix the base thoroughly before adding hardener
• Use only clean water as thinner
• Filter mixed material before spraying
• Observe the short brush pot life of 45 minutes
• Allow proper flash-off before accelerated curing
• Sand repaired areas before applying topcoat for optimum finish quality
• Clean equipment immediately using water followed by suitable cleaning thinner

Manufacturer / Aviation Spec Codes

• Product Name: SURFACER FR4-45
• Product Type: Water-based polyurethane aircraft interior surfacer
• Compatible Topcoats: FR2-55, FR6-55, FRC, DI-TEX
• Application: Aircraft cabin interior composite and thermoplastic preparation
• Thinner: Water