Permatex High Temperature Sleeve Retainer: Secures Studs, Pins, Slip & Pressure Fit Assemblies To 400?f (204?c); Uses - Valve Seats Cylinder Sleeves & Woodruff Keys; Prevents Fretting And Corrosion. Permatex, Made For The Professional. Made In U.S.A. & Oem Specified. Secures Studs, Pins, Slips & Press Fit Assemblies.