LOCTITE® 660 High Strength Retaining Compound

Features and Benefits

This very high viscosity, high-strength retaining compound is ideal for use on badly worn seats, keys, splines, bearings or tapers without re-machining. Also suitable for retaining shims.
If you want a product that enables re-use of worn bearing seats, keys, splines or tapers, LOCTITE® 660 is for you. This high-strength retaining compound is designed for the bonding of cylindrical fitting parts, particularly where bond gaps occur – and without the need for re-machining. It’s also suitable for retaining shims. You can expect excellent gap cure characteristics.
  • High viscosity
  • Ideal for use with worn parts without re-machining
  • Registered to NSF Category P1
  • Suitable for retaining shims
  • Gap fill of 0.01"-0.2" (0.25mm-0.5mm)
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Technical Information

Agency approvals / certificates / specifications NSF P1
Application method Manual
Applications Press Fitting, Repairing, Retaining
Color Silver
Cure type Anaerobic Cure
Fixture time 15.0 min.
Gap fill 0.25 - 0.5 mm
Key characteristics Gap Filling, Strength: High Strength, Thixotropic
Operating temperature -65.0 - 300.0 °F (-55.0 - 150.0 °C )
Physical form Paste
Recommended for use with Metal: Steel
Shear strength, Steel 23.0 N/mm² (3335.0 psi )
Viscosity 250000.0 mPa·s (cP)