Loctite Sleeve Retainer 640 is a high temperature anaerobic adhesive that secures slip and press fit assemblies. Adds up to 3,000 psi holding power. Restores fit to worn or out-of-tolerance assemblies. Prevents surface corrosion. Works to 400 degrees F. Typical applications include cylinder sleeves, valve guides, valve seats, bearings and bushings, woodruff keys, liner assemblies.