How Does VCI Film Work for Aerospace and Auto Tier Packs?
VCI film releases a dry corrosion-inhibiting vapour inside a sealed pack so mixed metals stay rust-free without oil. After clean dry parts go into a multimetal bag or under sealed stretch/shrink, inhibitor molecules vapourise into the free space, coat steel, aluminium and plated hardware, and interrupt the metal-oxygen-moisture corrosion cycle. When the pack opens at OEM inspection or a U.S. line, the vapour clears. Parts stay dry and clean. That is why aerospace programs searching "replace rust oil" and auto Tier plants searching "VCI bags for export" specify multimetal film over greasy coatings.
Zerust multimetal bag guidance and Cortec/Armor film practice correctly stress seal integrity, dry metal before pack and multimetal chemistry when mixed metals share one kit. In Querétaro those rules decide whether Parque Aeroespacial detail parts open inspection-ready and whether El Marqués Tier kits survive highland day-night condensation plus USMCA road dwell. BENZ supplies that chemistry as 3-layer multimetal VCI film converted into bags and rolls, plus stretch and shrink for larger loads and nearshoring pallets.
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