LOCTITE 638 is designed for the bonding of cylindrical fitting parts, particularly with narrow bond gaps approaching 0.25 mm. 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.

High strength on all metals, including passive substrates (e.g. stainless steel
Ideal for shafts, gears, pulleys and similar cylindrical parts
Tolerates minor contaminants, including industrial oils
High temperature resistance
Recommended Primer - LOCTITE 7649 (NZSB Code: 05133309) / LOCTITE 7471 (NZSB Code: 05202502) Refer to TDS
Recommend Cleaning/Surface Preparation - LOCTITE SF 7063 (Code: 427410)