Loctite Viperlube High Performance Synthetic Grease is a NLGI Grade 2 Severe Duty GC-LB Grease that provides superior protection for equipment exposed to a wide range of operating temperatures and environments. Use as a lubricant and protective anti-rust film on bearings, machine parts, equipment, or as a release agent on gaskets and seals. NSF H1 rated for incidental food contact. Loctite Viperlube High Performance Synthetic Grease Item# 36781 is the replacement for Loctite Viperlube High Performance Synthetic Grease Item# 37575.