Zerust ICT Poly Coated Reinforced VCI Paper is a high-quality 35# kraft paper that is saturated on one side with proven Zerust corrosion inhibitors and laminated with a 3/4 mil polyethylene layer and fiberglass scrim on the back side to provide superior strength. Place the plain kraft paper side facing the metal surface to allow the powerful vapor corrosion inhibitors (VCI) to protect the ferrous, non-ferrous, or multimetal parts. Zerust VCI Paper is acid-free, pH neutral, and non-abrasive. It uses Zerust Vapor Corrosion Inhibitor (VCI) technology that is safe* and does not leave a residue.