LOCTITE LB 8209 is a white to off-white, high performance, chemically inert, synthetic grease composed of perfluoropolyether (PFPE) and polytetrafluoroethylene (PTFE) designed specifically to provide long-lasting lubrication in severe chemical environments. Typical applications include bearings, valves, etc. with an operating range of -14. 8 °F to +500 °F (-26 °C to +260 °C).