Loctite 620 High Temperature Retaining CompoundLoctite 620 is a high strength, high temperature resistant retaining compound. Loctite 620 is a retaining compound designed for the bonding of cylindrical fitting 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. Typical applications include locating pins in radiator assemblies, sleeves in pump housings and bearings in auto transmissions.