Retaining Compound - high strength. High temperature resistance. Ideal for retention of parts with a clearance or interference fit. LOCTITE 648 is designed for the bonding of cylindrical fitting parts. 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. The product also works on passive substrates and offers high-temperature performance and good oil tolerance. Features: High temperature resistance Proven to be tolerant of minor contamination due to industrial oils High strength on all metals, including passive substrates Ideal for retention of parts with a clearance or interference fit P1 NSF Reg. No.: 148350 DVGW Approval (EN 751-1): NG 5146C00236 WRAS Approval (BS 6920): 0808532