3M(TM) 5-Way Penetrant, 24 fl oz aerosol can, 12 per case Multi-purpose product that is effective as a demoisturant - displaces moisture and dries out electrical apparatus. Inhibits rust - spreads a thin, even film that actually penetrates the pores of the surface to inhibit rust and corrosion. Penetrant - frees rusted, frozen bolts, nuts, etc. Lubricant - for delicate machines or precision instruments.