Primer 50 is a single component, non-CFC solvent-based product designed to promote the cure speed of Hernon® anaerobic adhesives and sealants. Primer 50 is used where increased cure speed of Hernon® anaerobic adhesives and sealants is required. It is especially recommended for applications with passive metals or inert surfaces and with large bond gaps. It is particularly recommended for cure conditions below 15°C. Primer 50 meets the requirements of ASTM D5363 (Grade N) and MIL-S-46163A Grade F.