Akzonobel - Formely Mapaero THINNER SP350 PLUS (1-LTR)

Additional Product Information

Overview

The PRIMER SP350 is a chromate-free, three-component high-solid epoxy primer designed for aircraft structure corrosion protection and advanced aerospace surface finishing. Developed for aviation and maintenance, repair, and overhaul (MRO) environments, it is widely used to protect metallic aircraft components, particularly aluminium alloys. Teams rely on SP350 for its strong adhesion, environmental resistance, and compatibility with high-performance polyurethane topcoat systems such as XS420.

Key Technical Specs for PRIMER SP350

• Type: Three-component high-solid epoxy aerospace primer
• Size / Volume: Base – 4 L; Hardener – 0.5 L and 5 L; Thinner – 1 L and 5 L; Touch-Up Kit – 45 mL (40 mL base + 5 mL hardener)
• Color: Beige
• Viscosity / Consistency: Spraying viscosity at 20°C (68°F) – CA4 / ISO4 cup measurement: Without dilution – 16 ± 3 s (CA4) / 25 ± 4 s (ISO4) With dilution – 15 ± 3 s (CA4) / 20 ± 4 s (ISO4)
• Cure / Working Time (Pot Life): 3 hours at 15°C to 30°C (59°F to 86°F) 1 hour at 30°C to 35°C (86°F to 95°F)
• Typical Uses: Aircraft metallic structure corrosion protection, aluminium alloy parts, landing gear components, nacelles, and aerospace maintenance coating

Approvals & Specifications

• Safran Landing Systems – IFC30-125-06
• Safran Nacelles – HMRC0149A
• Safran Aircraft Engines – DMR74-130
• Qualified under aerospace OEM performance requirements (customer specification priority applies when applicable)

Typical Aircraft MRO / AOG Applications

• Aluminium aircraft structural corrosion protection
• Landing gear component coating and repair
• Nacelle and engine structure surface protection
• Aircraft maintenance touch-up coating
• Metallic airframe part refurbishment

Compatibility & Safety Notes

• Compatible substrates include treated aluminium alloys such as Alodine 1200 conversion coatings, chromic acid anodizing (sealed or unsealed), sulfuric anodizing (sealed or unsealed), and tartric sulfuric anodizing systems.
• Apply only on properly prepared surfaces following supplier surface treatment guidance.
• Use dry, oil-free compressed air during spray application.
• Refer to Safety Data Sheet (SDS) for PPE requirements and handling precautions.

Packaging & Procurement

• Available Components: Base, hardener/catalyst, and SP350 PLUS thinner
• Packaging Sizes: 4 L base, 0.5 L and 5 L hardener, 1 L and 5 L thinner
• Touch-up kit available for maintenance operations
• Store tightly sealed in recommended environmental conditions

Why PRIMER SP350 is Chosen for AOG / MRO

• Fast-curing aerospace epoxy formulation supports maintenance turnaround requirements
• Chromate-free technology improves environmental and occupational safety compliance
• High adhesion performance reduces coating failure risks
• Flexible application through spray or brush methods
• Optimized for aircraft structural corrosion defense

Practical Suggestions for Your Team (AOG Mindset)

• Maintain storage temperature between 5°C and 35°C (41°F and 95°F).
• Pre-condition unmixed components at 18°C to 25°C (64°F to 77°F) for 24 hours before use.
• Observe pot life limits to avoid surface drying and application defects.
• Use recommended dilution only when temperature exceeds 28°C (82.4°F).
• Filter mixture through 120–150 µm filtration before spraying.

Manufacture / Aviation Spec Codes

• Manufacturer: MAPAERO SAS (Aerospace coatings division)
• Product ID: PRIMER SP350
• OEM Qualification References: Safran Landing Systems, Safran Nacelles, Safran Aircraft Engines

Alternative Names & Descriptions

• SP350 Aerospace Epoxy Primer
• Chromate-Free Aircraft Structural Primer SP350
• MAPAERO SP350 High Solid Corrosion Protection Primer
• Aircraft Aluminium Alloy Epoxy Basecoat SP350
• Aviation MRO Epoxy Structural Primer SP350