Loctite 638 retaining compound is made especially for bonding of cylindrically fitting pieces with gaps up to 0.25mm. This adhesive from Loctite is resistant to high temperatures and works perfectly fine even when faced by minor contamination by industrial oils. Loctite 638 retaining adhesive is best suited for pulleys, shafts and gears. It works well with both active and passive metal substrates and demonstrates an excellent cure performance. This adhesive conforms to (EN 751-1): NG-5146AR0619 and (BS 6920): 0511518 standards.