Loctite 638 Retaining Compound

• 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.
• It not only works on active metals but also on passive substrates, exhibiting robust cure performance.
• The product offers high-temperature performance and good oil tolerance, and tolerates minor surface contaminants.
• Tolerates minor contaminants, including industrial oils.
• DVGW Approval (EN 751-1): NG-5146AR0619.