Top Tips for Properly Sealing VCI Rust-Prevention Packaging—And ...

When it comes to preventing rust and corrosion on metal parts during storage or shipping, Vapor Corrosion Inhibitor (VCI) packaging is an easy-to-use and effective solution. Unlike traditional rust prevention methods that rely on messy, time-consuming oils and greases, VCI packaging—such as paper or poly film—is clean, dry, and leaves no residue. It provides continuous protection simply by wrapping or enclosing the metal inside the packaging.

Yuanlong Packaging Product Page

However, to maximize the rust-prevention performance of your VCI packaging, it must be securely and properly sealed. Without an airtight seal, moisture and oxygen can penetrate the package, reducing the effectiveness of the VCI and leaving metal surfaces exposed and vulnerable to corrosion.

Here’s a breakdown on how VCI works, why a proper seal is essential, and Armor Protective Packaging®’s top tips for achieving an airtight seal on your rust-prevention packaging that will protect your metal parts for the long haul.

How Does VCI Packaging Prevent Rust?

VCI (Vapor Corrosion Inhibitor) packaging, like the line offered by ARMOR, provides a clean and effective method for protecting metal parts from rust. It combines VCI, such as ARMOR VCI Nanotechnology™, with packaging materials like Kraft paper, poly film, chipboard, or foam pads.

Here’s how it works:

When metal parts are enclosed in VCI packaging, the VCI is activated and releases rust-inhibiting vapors that form a protective layer on the surface of the metal. This layer blocks moisture, oxygen, and other elements that can cause corrosion.

Unlike traditional rust preventatives, VCI protects both exposed surfaces and penetrates intricate, recessed, and hard-to-reach areas, providing comprehensive protection. To maximize its effectiveness, VCI packaging must be used in a sealed or airtight environment that maintains the proper concentration of protective vapors.

To Maximize Your VCI Protection –      Seal the Deal

To maximize the effectiveness of VCI packaging in preventing rust, it is essential to create a packaging environment where the protective vapors of VCI can circulate freely and do their job without interference. One key factor? An airtight seal. It can make all the difference in getting the most out of your VCI packaging—here’s why:

• Blocks Out Moisture and Oxygen
  Corrosion requires moisture and oxygen. VCI packaging that is securely sealed prevents external air and moisture from entering the package, ensuring that the VCI vapors maintain their protective environment.
• Preserves VCI Concentration and Coverage
  A proper seal keeps VCI vapors contained, allowing them to circulate and saturate the packaging environment. This ensures the vapors distribute evenly—even to hard-to-reach surfaces—forming a protective molecular barrier on the metal’s surface.
• Extends Corrosion Protection
  An airtight seal helps maintain the effectiveness of VCI packaging over time, especially during storage or shipping. Without it, VCI vapors can escape and environmental factors like humidity or temperature changes can compromise corrosion protection.

Choose from VCI POLY film sheets, tubing, or flat or gusseted bags—each designed to protect your metal parts with reliable, effective rust prevention.

If you want to learn more, please visit our website Vci Poly Bags.

Shop ARMOR POLY VCI FILM >

Best Methods for Sealing VCI Packaging

To get the most out of your VCI packaging, it’s crucial to choose the correct sealing technique. The best option depends on the type of VCI material used and the specific requirements of your application. Here are the top sealing options:

Heat Sealing:

This method creates the most effective and airtight seal by bonding the edges of VCI poly film or bags. It prevents moisture and air from entering, making it ideal for long-term storage or shipping.
Tip: Use a heat sealer with a temperature setting appropriate for the thickness of the VCI poly film to ensure a secure seal.

Folding and Taping/Stapling:

A simple and reliable option for large metal parts or machinery. Wrap the metal item in VCI poly film or place it in a VCI poly bag, fold the edges tightly, and secure them with industrial-grade packaging tape or staples. If using staples, apply tape over the staple holes to prevent moisture and air from entering.
Tip: Before sealing, fold VCI packaging carefully to keep water from collecting and getting inside when opened.

Resealable Zip Top:

Rust-prevention bags made from VCI poly film with built-in resealable zip tops are both user-friendly and allow for easy access to the metal parts inside. These zip-top bags maintain a secure seal while enabling easy reclosure and repeated use.
Tip: Always ensure the interlocking grooves of the zipper track are fully aligned after closing.

Wire, Twist, or Zip Ties:

A quick and efficient closure option for VCI packaging, commonly used for smaller metal parts. Wire ties, twist ties, or zip ties help minimize exposure to moisture and contaminants, providing effective short-term rust protection. While not as airtight as heat sealing, this method offers sufficient protection for temporary storage.
Tip: After securing with ties, fold and tape the opening to prevent gaps that could compromise the rust protection.

Additional Tips for Maximizing VCI Protection

Sealing the package is just one piece of the puzzle. To further enhance the effectiveness of VCI packaging, follow these best practices:

• Clean and Dry Metal Parts
  Before packaging metal parts, ensure they are clean, dry, and free from contaminants like dirt, oil, or moisture, which can prevent VCI vapors from forming an effective protective layer on the metal surface.
• Minimize Distance from Metal
  For the most effective corrosion protection, ensure the VCI packaging material is as close to the metal surface as possible, allowing the VCI’s rust-preventing vapors to form a protective shield on the metal.
• Avoid Contact with Acidic Materials
  Keep metal parts from coming into contact with corrugated boxes, wooden pallets, or other materials that contain moisture, acids, and contaminants, which can accelerate oxidation and corrosion.
• Add Desiccants for High-Humidity Environments
  In humid conditions or during extended storage, place desiccant packs inside the VCI packaging to adsorb moisture and provide added protection against corrosion.
• Store VCI Materials Properly
  Keep unused VCI materials in their original packaging and store them in a cool, dry environment—out of direct sunlight and protected from the elements. Recommended storage temperatures are between 40°–110°F (5°–43°C).

Final Thoughts: Seal It Tight, Protect It Right

Properly sealed VCI packaging is essential for keeping metal parts safe from corrosion and in optimal condition. Whether it’s heat sealed, folded and taped, or zippered closed, a secure seal effectively blocks out moisture, oxygen, and other corrosion-causing elements. These expert tips, based on best practices, are designed to simplify the process, protect your metal parts, and reduce the risks—and costs—associated with rust and corrosion.

Contact us to discuss your requirements of esd bags wholesale. Our experienced sales team can help you identify the options that best suit your needs.

Posted: 5/29/ 9:35:45 AM EDT I want to store a couple of unused pistols in VCI bags in my basement. Any issues, life span of VCI bag. I'm going to test a pistol with one of these bags.

Failed To Load Product Data

I looked into them about 10 yrs ago and decided to pass.  From what I remember of my research was they weren’t good for wood long term and the price per bag. (Admit I could be wrong about wood, but that is what is coming back to this old man’s mind).  For me, it also could have made them harder to store in the safe due to size and awkward shape of bags. VCI is probably the best corrosion preventative. I've switched from dessicants and golden rods to VCI capsules and emitters in the safes/ammo boxes. It simply is superior protection of all metals.

VCI works for 5+ years, even more if left unopened.

I've used bags from polygunbag.com(no affiliation) in the past because they are cheap and 6-8 mil thick. Two particular firearms I had were stored in the basement for 8 years. No corrosion whatever. They weren't even oiled up that good, with VCI it actually works better if they are in a dry state. IME there's no disadvantages to VCI. Give me a few months and I’ll give you a first hand report. When I moved to Canada I stored everything I own individually in VCI bags in a locked Rigid job box in a basement storage room. Moving back to the states shortly so once I’m settled in everything will be retrieved. Hopefully it’s all as nice as the day I put it there.