From the press release:
An effective way to protect our firearms, knives and other metal objects that are exposed to the moisture of summer is a simple wipe down with Sentry Solutions' Tuf-Cloth on a regular basis. Tuf-Cloth contains solid particulates that are deposited on the treated surfaces of the metal that provide a barrier to the moisture and actually repel water effectively. This preserves the surface finish of your equipment from the adverse effects of moisture and other corrosives that cause ferrous metal objects to oxidize and rust.