Henkel LOCTITE-AA-3321 (25-ml-Btl)

Additional Product Information

Overview

LOCTITE AA 3321 is a one-component, UV/visible light-curing acrylated urethane adhesive designed for fast, flexible bonding of plastics, glass and metals. In aviation and MRO environments, it supports rapid assembly, repair and component bonding where speed, precision and reliable performance are critical. Maintenance teams rely on this adhesive for its gap-filling capability, shock-absorbing flexibility and excellent adhesion across multiple substrates.

Key Technical Specs for LOCTITE AA 3321

• Type: UV/Visible light-curing acrylated urethane adhesive
• Size / Volume: Available in industrial pack sizes (contact supplier)
• Color: Transparent liquid
• Viscosity / Consistency: Medium, thixotropic (3,500 – 7,500 cP / mPa·s at 25°C / 77°F)
• Cure / Working Time: Fixture time ≤5–15 seconds depending on substrate and UV intensity
• Tensile Strength: 18.6 N/mm² (2,700 psi)
• Elongation at Break: 250%
• Shore Hardness: Shore D 53
• Service Temperature: Not specified – verify for application requirements
• Typical Uses: Bonding PVC to polycarbonate, plastics, glass and metals
• Shelf Life: Refer to packaging label; store at 8–21°C (46–70°F)

Approvals & Specifications

• Qualified to Henkel ISO 10993 Protocol for medical device applications
• Suitable for sterilization processes including EtO, Gamma radiation and steam autoclave (testing recommended)
• Batch testing and quality controls per Henkel Material Specification (LMS)

Typical Aircraft MRO / AOG Applications

• Bonding plastic interior panels and cabin components
• Repair of polycarbonate lenses, covers and housings
• Securing connectors, electrical housings and plastic fittings
• Bonding glazing and transparent plastic assemblies
• Fast repairs requiring rapid UV curing during AOG situations

Compatibility & Safety Notes

• Excellent adhesion to PVC, polycarbonate, glass, many plastics and most metals
• Not recommended for oxygen-rich systems or strong oxidizing materials
• Keep exposure to daylight and artificial light minimal during handling
• Use appropriate PPE including gloves and eye protection
• Ensure surfaces are clean and free from grease before bonding

Packaging & Procurement

• Supplied in light-protective containers for UV-sensitive storage
• Dispense using applicators with black feedlines for best results
• Store in dry conditions at 8–21°C (46–70°F)
• Contact supplier for available pack sizes and procurement options

Why LOCTITE AA 3321 is Chosen for AOG / MRO

• Ultra-fast UV curing reduces aircraft downtime
• Flexible, shock-absorbing bonds improve durability
• Gap-filling capability supports repair of varied assemblies
• Broad substrate compatibility simplifies inventory
• Reliable environmental and chemical resistance

Practical Suggestions for Your Team (AOG Mindset)

• Stock UV-curing adhesives alongside portable UV lamps for field repairs
• Train technicians on light-curing best practices and exposure times
• Store in controlled environments to maintain performance
• Test substrates before critical repairs to confirm suitability

Manufacture / Aviation Spec Codes

• Manufacturer: Henkel
• Product ID: LOCTITE AA 3321
• Technology: Acrylic / UV-curing adhesive

Alternative Names & Descriptions

• Loctite AA 3321 UV Adhesive
• Henkel Light-Cure Acrylic Adhesive 3321
• Loctite UV Structural Plastic Bonding Adhesive
• LOCTITE 3321 Flexible UV Adhesive
• Henkel Acrylic Urethane Light Cure Adhesive