Frequently Asked Questions About VCI 1. What is the difference between “Shelf Life” vs. “in-service life”? The Shelf Life is the duration of time that unused VCI Products can be stored prior to use without losing their effectiveness. The in-service life is the duration of time that VCI Products will Protect Clean Metal Objects from Corrosion if used properly. Rust Prevention, Rust Preventive, VCI, Clean Metal Parts, BENZ Packaging Solutions, Packaging, Corrosion, Corrosion Protection, FAQ, Protective Packaging