what is cosmoline
Cosmoline is the genericized trademark for a generic class of rust preventives, typically conforming to United States Military Standard MIL-C-11796C Class 3, that are a brown colored wax-like mass; have a slight fluorescence; and have a petroleum-like odor and taste (as detected when working with it).osmoline melts at 113â125 Â°F (45â52 Â°C) and has a flash point of 365 Â°F (185 Â°C). Its most common use is in the storage and preservation of some firearms, hand tools, machine tools and their tooling, and marine equipment.