Metal Guard 821 is a water-soluble liquid concentrate specifically formulated to provide
temporary rust protection of steel indoors. It leaves a dry, invisible, non-oily film that will not
hinder subsequent operations. It can be used as a final dip in tumbling or soak operations
to prevent possible oxidation of steel parts. Since it is a water solution, it does not present a
fire hazard, nor does it present a toxicity problem.
