640 250ml Loctite

High strength retaining compound

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.

Features and Benefits

• 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

Technical Information

• Chemical basis / base - Methacrylate
• Colour, 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)