This gun oil also serves as an effective rust inhibitor, with over 40 years of proven performance in diverse climatic conditions, preventing rust even in the most challenging hunting and shooting environments. It is not a modern synthetic chemical that damages gun finishes and bluing; rather, it is a blend of petroleum distillates specifically formulated for application on firearms, tools and machinery. The oil penetrates pores to reach beneath fingerprints and moisture, subsequently leaving an invisible film that protects and lubricates. Unlike general-purpose, water-displacing rust inhibitors, RP2 does not accumulate in crevices.