LOCTITE 662
Harmonization Code : 3824.99.92.97 | Prepared binders for foundry molds or cores; chemical products and preparations of the chemical or allied industries (including those consisting of mixtures of natural products), not elsewhere specified or included: other : other : other
Main features
- Anaerobic-and-UV Dual Cure
- Fast Exposed-Bead Fixturing
- High-Strength Cylindrical Retention
Product Description
LOCTITE 662 is a yellow, medium-viscosity one-component retaining compound with anaerobic cure inside cylindrical metal fits and UV cure for exposed material outside the bondline. This dual mechanism allows the retained joint and visible overflow bead to be cured within one process. A 1,750 to 3,250 mPa s viscosity supports controlled application before assembly. UV exposure at the specified intensity can fixture glass assemblies in 10 seconds or less, while steel pin-and-collar shear strength develops through the specified ambient cure periods. The product is intended for high-strength retaining applications where exposed material also requires cure.
Key features
- Anaerobic-and-UV dual cure: Confined material cures anaerobically while exposed beads can be cured with UV light.
- Fast exposed-material fixture: The listed UV exposure fixtures glass in 10 seconds or less.
- High-strength cylindrical retention: Steel pin-and-collar shear strength reaches 30 N/mm^2 after 24 hours at 22 deg C.
Applications / Suitable for
- High-strength cylindrical retaining
- Cylindrical fits with exposed adhesive beads
- Assemblies requiring UV cure outside the bondline
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Thermal Properties
Physical Properties
Curing Conditions
Additional Information
As-supplied / before-processing properties
Typical values and characteristics for the product before cure, application, or assembly.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Yellow liquid | - | As supplied |
| Chemical type | Urethane methacrylate | - | One-component material |
| Specific gravity | 1.07 | - | 25 deg C |
| Viscosity | 1,750 to 3,250 | mPa s | Brookfield RVT, spindle 3, 20 rpm, 25 deg C |
| Bondline cure mechanism | Anaerobic | - | Confined between close-fitting metal surfaces |
| Exposed-material cure mechanism | UV light | - | Visible overflow beads and fillets |
| Secondary cure support | Activator | - | When specified for the application |
After-processing / final-state properties
Typical values for the cured, bonded, treated, or in-service product under the listed conditions.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| UV fixture time on glass | <=10 | s | 6 mW/cm^2 UV exposure |
| Tack-free time | 45 | s | 60 mW/cm^2 at 260 nm or 100 mW/cm^2 at 365 nm |
| Compressive shear strength | >=10 | N/mm^2 | Steel pins and collars, cured 15 min at 22 deg C |
| Compressive shear strength | 30 | N/mm^2 | Steel pins and collars, cured 24 h at 22 deg C |
| Compressive shear strength | >=25 | N/mm^2 | Steel pins and collars, cured 72 h at 22 deg C |
| Coefficient of thermal expansion | 100 x 10^-6 | K^-1 | Cured material |
| Thermal conductivity | 0.1 | W/(m K) | Cured material |
| Specific heat | 0.3 | kJ/(kg K) | Cured material |
