Description: LOCTITE 638 is a multi-purpose, high-strength, fast-curing retaining compound. It is formulated for …
LOCTITE 638 is a multi-purpose, high-strength, fast-curing retaining compound. It is formulated for the coaxial bonding of cylindrical components, especially those with reduced clearance, close to 0.25 mm. The product cures when confined between closely fitting metal surfaces in the absence of air, preventing loosening and leakage caused by heavy impacts and vibrations. It works not only on active metals but also on passive substrates, exhibiting strong curing properties. The product has high-temperature resistance and good oil tolerance, while also withstanding mild surface contaminants. Certified by KIWA under the GASTEC QA AR 214 standard for mixtures up to 100% gaseous hydrogen.