AkzoNobel THINNER SP350 PLUS (5-Ltr)

Additional Product Information

Overview

PRIMER SP350 is a chromate-free, three-component high-solid epoxy primer designed for aircraft structural corrosion protection and surface durability. It is widely used in aviation manufacturing and Maintenance, Repair and Overhaul (MRO) environments to protect metallic airframe components, especially treated aluminium alloys. Aerospace teams rely on SP350 for its strong adhesion, chemical resistance, and compatibility with polyurethane topcoats such as XS420.

Key Technical Specs for PRIMER SP350

• Type: Chromate-free, high solid three-component epoxy primer
• Size / Volume: Base – 4 L (1.05 gal), Hardener – 0.5 L and 5 L options, Thinner – 1 L and 5 L options, Touch-Up Kit – 45 mL (40 mL base + 5 mL hardener)
• Color: Beige
• Viscosity / Consistency: Spraying viscosity at 20°C (68°F): With dilution – CA4 ISO4: 15 ± 3 s Without dilution – CA4 ISO4: 16 ± 3 s
• Cure / Working Time: Pot life 3 hours at 15°C–30°C (59°F–86°F); 1 hour at 30°C–35°C (86°F–95°F)
• Drying Time: Dry to handle in approximately 6 hours at 23°C ±2°C (73°F) for 20 µm (0.8 mil) film thickness
• Film Thickness: Recommended dry film thickness 15–35 µm (0.6–1.4 mils); wet film thickness 20–50 µm (0.8–2 mils)
• Service Temperature: Dependent on complete coating system and substrate treatment
• Typical Uses: Aircraft metallic structure protection, aluminium alloy parts, landing gear components, nacelles, and MRO surface restoration

Approvals & Specifications

• Safran Landing Systems – IFC30-125-06
• Safran Nacelles – HMRC0149A
• Safran Aircraft Engines – DMR74-130
• Qualified aerospace coating performance standards for structural protection

Typical Aircraft MRO / AOG Applications

• Aircraft airframe corrosion protection
• Landing gear structural components
• Nacelle and engine structure surfaces
• Aluminium alloy structural assemblies
• MRO touch-up and surface restoration work

Compatibility & Safety Notes

• Compatible substrates include Alodine 1200 conversion layers, chromic acid anodizing (sealed or unsealed), sulfuric or tartaric-sulfuric anodizing treatments.
• For steel components with cadmium or phosphate coatings, perform solvent reactivation cleaning before application.
• Use dry, oil-free compressed air during spray application.
• Wear appropriate aerospace-grade PPE and follow the Safety Data Sheet during handling.

Packaging & Procurement

• Available as base, hardener, and thinner components or as complete SP350 kits.
• Packaging options support maintenance operations, including 45 mL touch-up kits for field repair.
• Store unopened containers in temperature-controlled conditions between 5°C and 35°C (41°F and 95°F).
• Ensure containers are tightly sealed after opening to maintain product stability.

Why PRIMER SP350 is Chosen for AOG / MRO

• Fast and reliable corrosion barrier performance for critical aircraft structures
• Flexible application through spray or brush methods
• Portable touch-up kit options for AOG field operations
• Predictable curing behavior supporting maintenance scheduling
• High adhesion performance on treated aluminium alloys

Practical Suggestions for Your Team (AOG Mindset)

• Pre-condition base and hardener components at 18°C–25°C (64°F–77°F) for approximately 24 hours before mixing.
• Follow the recommended mixing ratio of 100:11 (base to hardener by weight).
• Sieve mixed material through 120–150 µm filters before spray application.
• Respect pot life limits by covering mixed material during use.
• When temperature exceeds 28°C (82.4°F), use SP350 PLUS thinner for viscosity adjustment.

Manufacture / Aviation Spec Codes

• Manufacturer: Mapaero SAS
• Product Line: Aerospace epoxy structural primer
• Export / OEM References: Safran-qualified coating system

Alternative Names & Descriptions

• Aerospace chromate-free epoxy aircraft primer
• Aircraft structural corrosion protection primer
• SP350 high solid epoxy aviation coating
• Mapaero aerospace structural primer SP350
• Chromate-free aircraft metal protection primer