LOCTITE® 640

Features and Benefits

High strength, methacrylate ester-based retaining compound that is slow curing; ideal for large diameter components and 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
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Documents and Downloads

Safety Data Sheets and RoHs
LOCTITE® 640, 50 ml Bottle 135520 en-CA
IDH: 135520
EAN: 079340640313

Size Case: Bottle

Quantity: 10.0/case

LOCTITE® 640, 250 ml Bottle 135521 en-CA
IDH: 135521
EAN: 079340640412

Size Case: Bottle

Quantity: 10.0/case

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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)