Loctite 2620 is designed for the locking and sealing of threaded fasteners. The product cures when confined in the absence of air between close fitting metal surfaces and prevents loosening and leakage from shock and vibration. Particularly suited for applications where extreme high temperature resistance is required. Loctite 2620 ultra high temperature, high strength red threadlocker locks and seals threaded fasteners in applications that require continuous temperature resistance up to 650 °F. This high strength threadlocker comes in a convenient syringe for easy dispensing.