Zerust/Excor ActivCapsule FAC1-1(S) drop-in vapor corrosion inhibitor (VCI) capsule for temporary corrosion protection inside sealed enclosures, control cabinets and tool boxes. The capsule mounts with adhesive tape and diffuses invisible, odorless, non-toxic VCI molecules that settle onto exposed metal and dissipate on opening, leaving no residue on electrical contact surfaces. Protects ferrous metals for up to 1 year in a sealed enclosure and provides flash-corrosion prevention for aluminum and yellow metals (copper and brass) when used as instructed. Coverage up to 4 ft³. Supplied as a case of 50. Zerust part number 375-M-00106.