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LOCTITE® 640
Features and Benefits
Low-viscosity, high-strength retaining compound with good temperature resistance. Slow cure time makes it ideal for parts that need longer positioning time, such as large diameter parts or those made of active metals, such as brass.
LOCTITE® 640 is a green, anaerobic, low viscosity, methacrylate ester-based retaining compound ideal for parts requiring a longer positioning time. Fixturing time on steel is 2 h. Also used for active metals such as brass. This is a high strength product with good temperature resistance. Max. diametrical clearance is 0.1 mm and service temperature is -55 to +175ºC. Fluorescence allows product presence to be monitored.
- 1-part product, requires no mixing
- Slow curing
- Ideal for large diameter components
- High strength
- Also for active metals such as brass
- Good temperature resistance
Documents and Downloads
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Technical Information
| Chemical basis / base | Methacrylate |
| Color | Green |
| Diametrical clearance | <0.1 mm |
| Fixture time | 2.0 hr. |
| Recommended for use with | Metal: steel |
| Shear strength | 22.0 N/mm² |
| Viscosity, Falling Ball 'D' @ 25.0 °C | 450.0 - 750.0 mPa·s (cP) |
LOCTITE® 640
Low-viscosity, high-strength retaining compound with good temperature resistance. Slow cure time makes it ideal for parts that need longer positioning time, such as large diameter parts or those made of active metals, such as brass.