Technical Guide
to Rust Preventative Packaging Based on ARMOR's Recommendations

Which is a better rust inhibitor, VCI Paper or VCI Poly?

VCI paper — such as ARMOR WRAP® VCI paper — is a neutral pH Kraft paper that is infused with VCI and is manufactured in sheets or rolls.  When compared to VCI poly film, VCI paper has a faster diffusion rate – paper releases VCI faster, which allows VCI to form its protective shield on the surface of metal parts more quickly.  That is not to say that VCI poly – such as ARMOR POLY® VCI film – is not an excellent rust preventative or that it does not have its place.  VCI poly, which is a polyurethane film with added VCI that has been manufactured in rolls, sheets, bags, tubing and shrink film, offers strong, moisture barrier properties and provides a physical barrier to protect metal from dust and contaminants.  While VCI paper diffuses VCI more quickly, VCI poly offers a greater level of barrier protection.  Both have their advantages depending on the environment that metal is being shipped or stored in.