Henkel LOCTITE-AA-3921 (25ML-SYRINGE)

Additional Product Information

Overview

LOCTITE AA 3921 is a one-component UV/visible light-curable acrylic adhesive designed for fast and reliable bonding. It is commonly used in precision assembly, including medical device and aviation applications, where speed, strength, and inspection capabilities are critical. Maintenance and repair teams rely on it for its rapid cure, high adhesion, and versatility across multiple substrates.

Key Technical Specs for LOCTITE AA 3921

• Type: Acrylic, UV/visible light curable
• Size/Volume: Available in multiple dispensing formats; refer to packaging section
• Color: Transparent to hazy liquid (uncured)
• Viscosity/Consistency: Low viscosity, suitable for precise dispensing
• Cure/Working Time: Fixture time ?5 seconds under 6 mW/cm UV light @ 365 nm
• Tensile/Peel Strength: Tensile strength 19.5 N/mm (2,830 psi), Elongation at break 32%
• Shore Hardness: D 67
• Service Temperature: Maintains bond performance under sterilization and autoclave conditions
• Typical Uses: Bonding metal, plastics, and glass; precision assemblies; disposable medical device components
• Shelf Life: Store at 8 21 C (46 70 F) for optimal stability; refer to container labeling

Approvals & Specifications

• ISO 10993 qualified for medical device applications
• Henkel internal quality standards
• Certificates of Compliance available via Henkel website

Typical Aircraft MRO / AOG Applications

• Bonding small precision components in aircraft instrumentation
• Repair of plastic or metal housings in avionics assemblies
• Rapid assembly of cockpit instrumentation where light-cure adhesives are applicable
• Maintenance of emergency medical kits on aircraft (disposable device assembly)

Compatibility & Safety Notes

• Substrate Compatibility: Glass, acrylic, polycarbonate, ABS, stainless steel, treated polyethylene and polypropylene
• PPE: Use gloves and eye protection during handling
• Handling Notes: Keep exposure to daylight or artificial light minimal; dispense using black feedline applicators
• Excess uncured adhesive can be removed with organic solvents (e.g., acetone)

Packaging & Procurement

• Available in various dispensing cartridges and bottles for precision application
• Store in unopened containers at 8 21 C (46 70 F)
• Easy-to-use applicators for precise deposition on small assemblies
• Market packs designed for AOG and routine MRO stocking

Why LOCTITE AA 3921 is Chosen for AOG / MRO

• Rapid UV cure reduces aircraft downtime
• High adhesion ensures long-term reliability
• Versatile on multiple substrates for diverse repair needs
• Fluorescence under UV simplifies inspection in tight spaces
• Compact packaging supports portability for AOG tasks

Practical Suggestions for Your Team (AOG Mindset)

• Stock multiple dispensing sizes for quick deployment
• Train maintenance personnel on UV curing times and safety precautions
• Handle adhesives in low-light conditions or use black feedline applicators
• Allow bonds to cool before applying service loads

Manufacture / Aviation Spec Codes

• Manufacturer: Henkel
• Product ID: LOCTITE AA 3921
• MIL/OEM Codes: Refer to Henkel Quality Department for export or OEM-specific codes

Alternative Names & Descriptions

• Henkel LOCTITE AA 3921
• UV Acrylic Adhesive AA 3921
• LOCTITE Medical Device Adhesive 3921
• Light Cure Acrylic Adhesive 3921
• Precision Bonding Adhesive AA 3921