LOCTITE® 641

Features and Benefits

This medium-strength retaining compound is designed for bonding cylindrical fitting parts, particularly where regular servicing is needed.
When you’re working with parts that need regular dismantling – retention of bearings on shafts and in housings, for example – try LOCTITE®  641. This medium-strength anaerobic retaining compound cures when confined in the absence of air between close-fitting metal surfaces and prevents loosening and leakage due to shock and vibration.
  • Medium strength for ease of disassembly
  • Ideal for parts that need frequent servicing
  • Secondary cure with activator
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Technical Information

Color Yellow
Fixture time 20.0 min.
Gap fill 0.15 mm
Key characteristics Strength: Medium Strength
Operating temperature -55.0 - 150.0 °C (-65.0 - 300.0 °F )
Recommended for use with Metal: Steel
Shear strength, Steel 12.0 N/mm² (1700.0 psi )
Viscosity 600.0 mPa·s (cP)