LOCTITE 641 is designed for the bonding of cylindrical fitting parts, particularly where disassembly is required for servicing operations. Ideal for parts that need subsequent dismantling, i.e. retention of bearings on shafts and in housings.

LOCTITE 660 is designed for the bonding of cylindrical fitting parts without the need for re-machining, particularly where bond gaps are larger such as with worn parts. The product cures when confined in the absence of air between close-fitting metal surfaces and prevents loosening and leakage due to shock and vibration.