Corrosion-Inhibiting Kraft Paper Built to MIL-PRF-3420
Military Packaging supplies VCI paper built to MIL-PRF-3420, the military specification for corrosion-inhibiting packaging paper. Treated with vapor corrosion inhibitors, this kraft paper protects bare metal from rust as you wrap it, with no oils or coatings to clean off later. We supply it in the grades your program requires, as sheets and rolls. Order VCI paper on its own or built into a complete preservation system we design around your parts.
MIL-PRF-3420 is the military specification for corrosion-inhibiting packaging paper. It defines a kraft paper treated with vapor corrosion inhibitors, so wrapping a metal part in it protects the surface from rust and corrosion during storage and shipping.
The inhibitor vaporizes inside the wrap and settles on the metal as a thin, protective layer, so the paper guards every surface it surrounds. Because that protection is dry, the part comes out clean and ready to use, with no oils to remove.
We supply MIL-PRF-3420 paper in the grades your program requires, as sheets and rolls. When a drawing calls for MIL-PRF-3420, this is the paper it means.
Every roll of MIL-PRF-3420 VCI paper we supply protects bare metal cleanly:
The specification defines what makes a compliant corrosion-inhibiting paper:
MIL-PRF-3420 comes in grades that set the paper’s weight and strength. A heavier grade gives more durability for rough handling and larger parts, while a lighter grade is economical for wrapping smaller or less demanding items.
We help you read the callout and supply the grade your drawing requires, or recommend one when the choice is open. Send us the spec and the part, and we will confirm the right MIL-PRF-3420 paper for the job.
MIL-PRF-3420 VCI paper protects bare and machined metal across a defense shipment:
MIL-PRF-3420 VCI paper protects the metal hardware these sectors ship and store every day:
A few factors point you to the right MIL-PRF-3420 paper. Weigh these, or send us the part and we will recommend one:
VCI paper is the corrosion-protecting wrap around a metal part. It goes on first, directly against the surface, and the vapor protects everything it surrounds. From there, a box or crate carries the wrapped part to its destination.
Sourced as one system, the paper is matched to the metal it protects and the container it ships in, so bare hardware stays corrosion-free from the moment you wrap it to the moment it goes into service.
Corrosion is a reaction between metal, moisture, and oxygen, and VCI paper interrupts it at the surface. The inhibitor in the paper vaporizes inside the wrap and settles on the metal, forming a molecular layer that blocks moisture and oxygen from reaching it.
Because the protection is a vapor, it reaches recesses and threads a coating would miss, and it replenishes itself as long as the part stays wrapped. That keeps the surface protected for the full storage period.
VCI paper is one form of vapor corrosion protection, and it is the right one for wrapping. For sealed protection, we supply VCI film and bags, and for enclosed cases and crates, VCI emitters release the vapor into the space.
We help you match the form to the job, wrapping with paper where a wrap fits and sealing with film or emitters where the part is enclosed. Tell us how your parts are packaged and we will recommend the form.
The advantage of VCI paper over oils and greases is a clean finish. The protective layer is thin and dry, so a wrapped part comes out ready to install, handle, or machine with no degreasing and no solvents.
For programs that pull parts straight from storage into service, that clean, dry protection saves time and avoids contamination. The part is protected in storage and ready the moment it is unwrapped.
Reading a preservation callout and supplying the right paper is what we do. Our team helps buyers and packaging engineers match the MIL-PRF-3420 grade to the part and the metal, and meet the preservation spec.
Send us the parts, the metals, and any spec callouts, and we will recommend the right VCI paper and quote it, so your hardware stays corrosion-free from the first shipment.
Every program defines corrosion protection a little differently, and we build to yours. When your documentation names a MIL-PRF-3420 grade or a preservation method, we match it exactly. When the choice is open, we recommend the paper that fits the metal and the conditions.
That flexibility means your packaging satisfies the spec and keeps the metal corrosion-free in practice, with no gap between the two.
VCI paper does its best work as part of a full system. We wrap the metal in the paper, seal it in a barrier bag with a desiccant where a vapor barrier is needed, cushion it against shock, and enclose it in a box or crate rated for the trip. Sourced together, these layers protect the surface, the part, and the shipment from corrosion, moisture, and impact alike.
We supply paper that meets MIL-PRF-3420 for corrosion protection, and we build it into packaging that satisfies your spec. Where your drawing cites the specification or a preservation method under MIL-STD-2073, we match it.
Where the drawing leaves a choice, we recommend the grade and form that best protect your metal. Either way, you get corrosion protection you can ship on.
Tell us the parts you need to protect, the metals involved, the grade or size you need, and any spec callouts, and we will recommend the right MIL-PRF-3420 paper.
We supply VCI paper as sheets and rolls, on its own or as part of a complete preservation system, with availability and turnaround confirmed in your quote.
We supply MIL-PRF-3420 VCI paper in the grade each job needs, and we know how to build it into a compliant preservation system alongside the right barrier and desiccant.
That combination keeps metal parts corrosion-free, surfaces clean, and hardware ready to use after shipping and long storage.
MIL-PRF-3420 is the military specification for corrosion-inhibiting packaging paper. It defines a kraft paper treated with vapor corrosion inhibitors that protect bare metal from rust as you wrap it, with no oils to clean off later.
VCI paper wraps metal parts to protect them from corrosion during storage and shipping. The vapor inhibitor protects every surface the paper surrounds, which makes it ideal for tools, fasteners, and machined parts.
No. The protective layer is thin and dry, so a wrapped part comes out clean and ready to use with no degreasing or solvents. That clean finish is a key advantage over oil and grease preservation.
It depends on the formulation, which is commonly geared to ferrous metals, with multi-metal options available. We confirm the paper protects the metals in your part before you order.
Yes. MIL-P-3420 was the older designation for the same VCI paper specification, now MIL-PRF-3420. If your drawing still calls out MIL-P-3420, we supply the current MIL-PRF-3420 paper to meet it.
VCI paper is the wrapping form of vapor corrosion protection. We also supply VCI film and bags for sealed protection and VCI emitters for enclosed cases and crates. We match the form to how your parts are packaged.
Tell us the parts you need to protect and the metals involved, and we will recommend the right MIL-PRF-3420 VCI paper, then get you a quote.
