Overview
LOCTITE AA 366 is a yellow-to-amber UV-curable structural adhesive engineered for fast fixturing and high-reliability bonding. It is specifically designed for applications where uncured adhesive outside the bond line must be fully eliminated through UV exposure. As an authorized LOCTITE adhesive supplier and distributor, E-ASIA stocks and ships AA 366 globally for industrial, OEM, and wholesale buyers.
This single-component adhesive requires no mixing and cures rapidly under UV light (365 nm), making it ideal for automated production lines and precision assembly environments. An activator — LOCTITE SF 7649 — is required for surfaces shadowed from UV radiation.
Technical Specifications
| Property | Value |
|---|
| Color | Amber / Yellow |
| Viscosity (Brookfield RVT, 25°C, Spindle 5, 20 rpm) | 5,000 – 10,000 mPa·s (cP) |
| Shear Strength | 13.5 N/mm² |
| Specific Gravity @ 25°C | 1.06 |
| Service Temperature Range | Up to +120°C |
| Mix Requirement | No mixing required |
| Primary Cure Wavelength | 365 nm UV |
| Full Surface Cure Wavelength | 250 nm UV (for air-exposed surfaces) |
| Typical Cure Condition | 20–30 seconds at 100 mW/cm² (medium pressure mercury vapor lamp) |
| Activator Required | LOCTITE SF 7649 |
Alt: LOCTITE AA 366 technical data table — UV cure adhesive viscosity and shear strength specifications
Key Features & Advantages
Fast Fixturing — Rapid UV cure under standard 365 nm lamps enables high-throughput production cycles without extended wait times.
UV + Activator Dual Cure System — Full cure on bond-line edges and air-exposed surfaces is achieved using 250 nm UV or LOCTITE SF 7649 activator, eliminating uncured residue.
High Temperature Resistance — Maintains structural integrity up to +120°C, suitable for motor components and industrial assemblies under thermal load.
Good Impact Resistance — Withstands mechanical shock and vibration in demanding assembly environments.
Good Humidity Resistance — Performs reliably in humid or damp operating conditions.
Low Viscosity Profile — Medium-low viscosity (5,000–10,000 mPa·s) allows controlled dispensing and thin bond line formation.
No-Mix Formula — Single-component system simplifies dispensing, reduces waste, and is compatible with automated adhesive dispensing equipment.
Applications
LOCTITE AA 366 is used across multiple industrial and precision manufacturing sectors. Common applications include:
Electric Motors — Bonding ferrites to plated metal components where fast cure speed and clean bondlines are required.
Loudspeaker Hardware — Structural bonding of speaker components requiring impact resistance and temperature stability.
Jewellery Manufacturing — Precision bonding of decorative and structural components where excess adhesive must be fully cured post-assembly.
Precision Electronics Assembly — Bonding small components where UV fixturing provides immediate handling strength.
General Industrial Bonding — Any application requiring a low-viscosity, UV-curable structural adhesive with activator compatibility.
Cure Guide
LOCTITE AA 366 cures when exposed to UV radiation at 365 nm. For surfaces exposed to air (outside the bond line), radiation at 250 nm is also required to achieve a complete cure and eliminate tacky residue.
Recommended Cure Conditions:
Intensity: 100 mW/cm² at product surface
Time: 20–30 seconds
Light Source: Medium pressure, quartz envelope, mercury vapor lamp
Where UV access is restricted (shadowed areas), use LOCTITE SF 7649 activator prior to assembly to ensure full cure throughout the joint.
Frequently Asked Questions (FAQ)
Q: Does LOCTITE AA 366 require mixing before use?
A: No. AA 366 is a single-component adhesive. No mixing is required, which simplifies dispensing in automated production environments.
Q: What activator is compatible with LOCTITE AA 366?
A: LOCTITE SF 7649 is the recommended activator. It is required for curing adhesive in areas not directly exposed to UV light.
Q: What is the maximum service temperature for AA 366?
A: The adhesive maintains performance up to +120°C, making it suitable for motor and electronic component assemblies subject to heat.
Q: Can LOCTITE AA 366 be used for metal-to-metal bonding?
A: Yes. It is designed for bonding ferrites to plated metals and is suitable for other metal-substrate applications in electrical and mechanical assemblies.
Q: Is LOCTITE AA 366 available for OEM and bulk orders?
A: Yes. E-ASIA supports OEM/ODM supply, wholesale, and bulk purchasing. Contact us for competitive pricing and lead times.
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