MIL-DTL-22020 Type I VCI Barrier Bags
MIL-DTL-22020E is the U.S. military detail specification for finished, transparent, flexible, sealable bags treated with a Volatile Corrosion Inhibitor (VCI). These bags are designed to help protect corrosion-sensitive metal components during military storage, preservation, and transportation.
Arms Preservation Inc. (API) can offer VCI storage bags that conform to MIL-DTL-22020E, including Type I heat-sealable configurations, for military, aerospace, defense, and industrial preservation requirements. API can accommodate custom packaging requirements, with availability and contract-specific documentation confirmed during quotation.
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What Is MIL-DTL-22020E?
MIL-DTL-22020E, officially titled "Bags, Transparent, Flexible, Sealable, Volatile Corrosion Inhibitor (VCI) Treated," establishes the requirements for finished flexible VCI packaging bags used in military preservation applications.
The specification defines requirements for bag construction, sealing, dimensions, workmanship, identification, and quality verification.
The VCI-treated material used to manufacture these bags is governed separately by MIL-PRF-22019, which establishes performance requirements for transparent, flexible, corrosion-inhibiting barrier materials.
This distinction is important: MIL-PRF-22019 establishes requirements for the packaging material, while MIL-DTL-22020 establishes requirements for the finished bag.
MIL-DTL-22020E at a Glance
| Specification | Description |
|---|---|
| MIL-DTL-22020E | Finished transparent, flexible, sealable VCI-treated bags. |
| MIL-PRF-22019E | Transparent, flexible VCI-treated barrier material used to manufacture the bags. |
| Type I | Heat-sealable VCI bags manufactured from Type I barrier material. |
| Type II | Pressure-sealable, or cold-sealable, VCI bags. |
| Class 2 Material | Light-duty MIL-PRF-22019 Type I material measuring less than 0.005 inch thick. |
| MIL-STD-2073-1 | Military preservation standard identifying VCI bag applications under Methods 31 and 33. |
| MIL-I-8574 | Requirements and limitations for using VCI-treated materials in military preservation. |
Key Specifications & Characteristics
1. Integrated Vapor Corrosion Inhibitor Technology
MIL-DTL-22020 bags are manufactured from VCI-treated packaging materials designed to help prevent corrosion on compatible metal surfaces.
The VCI chemistry gradually releases corrosion-inhibiting molecules into the enclosed packaging environment. These molecules interact with exposed metal surfaces and help suppress the electrochemical reactions responsible for rust and corrosion.
Unlike ordinary polyethylene bags, which primarily provide physical separation from the surrounding environment, VCI-treated packaging provides an additional mechanism for corrosion protection.
Because the inhibitor operates in the vapor phase, direct contact between the packaging material and every protected metal surface is not necessary.
2. Transparent, Flexible Construction
MIL-DTL-22020 bags utilize transparent, flexible materials that allow packaged components to be visually inspected without opening the protective enclosure.
This is particularly beneficial for military inventory management, maintenance operations, and inspection of sensitive replacement parts.
Transparency allows personnel to identify components, markings, and labels while minimizing unnecessary exposure of the packaged item to the surrounding environment.
3. Type I and Type II Sealing Requirements
MIL-DTL-22020 establishes two principal bag types based on the sealing characteristics of the underlying material.
- Type I – Heat-Sealable: Bags manufactured from MIL-PRF-22019 Type I material and sealed using suitable heat-sealing equipment.
- Type II – Pressure-Sealable: Bags manufactured from MIL-PRF-22019 Type II material designed for pressure or cold sealing.
Proper sealing is essential for maintaining the enclosed VCI preservation environment.
The selected bag type must match the applicable military preservation method and contract requirements.
4. Material Thickness and Classification
The MIL-PRF-22019 material specification establishes classifications for heat-sealable VCI packaging materials.
| Material Classification | Description |
|---|---|
| Type I, Class 1 | Medium-duty heat-sealable material measuring 0.005 inch or thicker. |
| Type I, Class 2 | Light-duty heat-sealable material measuring less than 0.005 inch. |
| Type II | Pressure-sealable VCI material. |
These classifications apply to the underlying MIL-PRF-22019 material. They should not be confused with separate bag classifications under MIL-DTL-22020.
5. Seal Strength and Mechanical Performance
MIL-DTL-22020E establishes requirements for bag fabrication, seam construction, dimensions, tolerances, and finished-bag workmanship.
The specification references MIL-STD-3010, Method 2024, for evaluating seal strength.
Depending on the bag type, finished seals must withstand the applicable specified loading conditions without separation during the prescribed testing period.
These requirements help ensure that finished bags maintain their intended integrity during preservation, handling, and storage.
Using qualified VCI material alone does not automatically establish finished-bag compliance. The completed bag must also satisfy the applicable fabrication and testing requirements.
6. Material Compatibility and Corrosion Protection
The underlying MIL-PRF-22019 specification addresses several important material performance characteristics, including:
- Vapor-phase corrosion inhibition
- Corrosion resistance on specified metal test specimens
- Contact corrosivity
- Copper compatibility
- Mechanical strength and durability
- Sealing performance
- Low-temperature flexibility
VCI formulations and their protective capabilities can vary. Compatibility with specific ferrous and nonferrous metals, coatings, and other materials must be evaluated for the intended application.
MIL-STD-2073-1 references MIL-I-8574 when determining whether VCI preservation is appropriate for a particular item.
7. Identification and Quality Control
MIL-DTL-22020E includes identification and quality requirements intended to support consistency, traceability, and military procurement.
Finished bags are subject to applicable requirements for workmanship, dimensional accuracy, sealing, and product identification.
Marking provisions address information such as the specification designation, bag type, manufacturer, and fabrication date.
Additional shipment and storage markings may be required under MIL-STD-129, depending on the contract.
8. Moisture Vapor Transmission and Barrier Properties
Although MIL-DTL-22020E bags utilize VCI-treated barrier materials, corrosion-inhibiting performance should not be confused with a specific moisture vapor transmission rate (MVTR).
MIL-DTL-22020E does not establish a single universal numerical MVTR requirement for every finished bag.
For applications requiring specialized moisture barriers, water-vapor resistance, or electrostatic protection, additional military packaging specifications may apply.
Choosing the appropriate combination of VCI chemistry, barrier construction, and sealing method is essential when developing a preservation system for demanding environments.
MIL-DTL-22020E and MIL-STD-2073-1 Preservation Methods
MIL-STD-2073-1 establishes standardized military packaging and preservation requirements for equipment, components, and supplies.
Paragraph 5.2.4.9 addresses the use of VCI-treated materials for compatible items under several preservation methods.
| Preservation Method | Application |
|---|---|
| Method 20 | VCI-treated material may be used to form the prescribed protective enclosure when applicable. |
| Method 31 | Waterproof, heat-sealed preservation using a MIL-DTL-22020 VCI bag or the permitted VCI wrapping alternative. |
| Method 33 | Greaseproof-waterproof, heat-sealed preservation using a MIL-DTL-22020 VCI bag or the permitted alternative. |
| Method 41 | Compatible items may use qualifying VCI wrapping material within a separate prescribed watervaporproof package. |
Important: MIL-DTL-22020 bags are specifically identified for appropriate VCI preservation applications under Methods 31 and 33. The use of VCI materials under other methods does not mean a MIL-DTL-22020 bag can replace every required barrier or packaging component.
MIL-STD-2073-1 also requires consideration of VCI compatibility before the preservation method is selected.
Learn more about MIL-STD-2073-1 Method 30 VCI Packaging.
Common Applications of MIL-DTL-22020 VCI Bags
Military Equipment and Defense Logistics
MIL-DTL-22020 VCI bags are used in military preservation applications where corrosion-sensitive metal components require protective packaging during storage, transportation, and distribution.
Potential applications include replacement parts, mechanical assemblies, maintenance components, and other compatible equipment requiring VCI preservation.
Aerospace and Aviation Maintenance
Aircraft components and aviation maintenance equipment may experience challenging conditions during extended storage and transportation.
Transparent VCI packaging can be suitable for preserving compatible fittings, fasteners, replacement parts, tooling, and precision components when specified by the applicable maintenance or preservation requirements.
Industrial Manufacturing and Precision Components
VCI-treated packaging can provide corrosion protection for a broad range of industrial applications, including:
- Precision-machined metal components
- Bearings, gears, and mechanical assemblies
- Metal fabrication and replacement parts
- Maintenance tooling and fixtures
- Industrial spare parts and inventory
- Corrosion-sensitive components during shipping
The appropriate packaging material and preservation method depend on the item, its materials, and the expected storage environment.
Long-Term Storage and Export Transportation
Metal components stored for extended periods or transported through humid environments may be exposed to conditions that accelerate corrosion.
VCI-treated bags help create a corrosion-inhibiting environment around compatible packaged items.
For demanding transportation conditions, moisture vapor resistance, package sealing, cushioning, and other environmental protection requirements should also be evaluated.
Firearms, Armories, and Weapon Components
VCI technology is also used in firearm and weapon-component preservation.
Properly selected VCI packaging can help protect compatible metal weapon components, maintenance spares, and armory equipment during storage.
Military applications must follow the applicable weapon-specific preservation instructions and contract requirements.
How VCI Technology Prevents Rust and Corrosion
Corrosion is an electrochemical process that occurs when environmental conditions support oxidation at a metal surface.
Moisture, contaminants, and corrosive atmospheric conditions can accelerate this process.
VCI-treated packaging provides corrosion protection by gradually releasing inhibitor molecules into the enclosed packaging environment.
These molecules migrate through the available airspace and interact with compatible metal surfaces, helping suppress corrosion reactions.
Because the corrosion-inhibiting chemistry operates in the vapor phase, it can reach exposed surfaces that are not in direct contact with the packaging material.
Unlike conventional methods relying on heavy protective coatings, appropriate VCI packaging can provide corrosion protection without requiring a thick coating of oil or grease on every exposed surface.
Effective protection still depends on proper cleaning, drying, material compatibility, and packaging integrity.
MIL-DTL-22020E vs. Other Military Packaging Specifications
Military preservation packaging utilizes several specifications addressing different protection requirements.
| Military Specification | Primary Purpose |
|---|---|
| MIL-DTL-22020E | Finished transparent, flexible, sealable VCI-treated bags. |
| MIL-PRF-22019E | Transparent VCI-treated packaging material. |
| MIL-DTL-117 | Flexible barrier bags manufactured from specified barrier materials. |
| MIL-PRF-131 | Flexible watervaporproof barrier materials commonly used in foil-laminate preservation packaging. |
| MIL-PRF-22191F | Transparent flexible barrier materials with specified environmental barrier characteristics. |
| MIL-PRF-81705 | Flexible electrostatic-protective barrier materials, with additional barrier characteristics depending on type. |
Each standard addresses specific material properties, packaging requirements, or protection mechanisms.
The correct selection depends on the required military preservation method, environmental exposure, and characteristics of the item being protected.
Arms Preservation Inc. MIL-DTL-22020E VCI Packaging Solutions
Arms Preservation Inc. can offer VCI packaging bags that conform to MIL-DTL-22020E.
API supplies corrosion-prevention packaging solutions for military, industrial, aerospace, and commercial applications.
Our capabilities include evaluating requests for Type I heat-sealable VCI bags, custom bag dimensions, and other contract-specific packaging requirements.
API can also assist customers seeking related VCI packaging formats and multilayer barrier solutions.
By combining knowledge of military preservation standards with practical packaging experience, API helps customers identify suitable corrosion-prevention solutions for their intended applications.
Finished-bag conformance, material requirements, lead times, and any requested documentation are evaluated for the specific quoted configuration.
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How Arms Preservation Multilayer VCI Bags Differ
In addition to MIL-SPEC preservation packaging, Arms Preservation Inc. manufactures reusable multilayer VCI firearm storage bags.
Unlike conventional single-layer VCI packaging, API can combine a VCI-impregnated interior layer with an exterior protective barrier.
This construction is designed to provide two important protective functions:
- Retaining VCI chemistry: The exterior barrier helps reduce the loss of corrosion-inhibiting molecules from the enclosed packaging environment.
- Reducing moisture intrusion: The exterior barrier helps limit the transmission of moisture vapor from the surrounding environment.
API's reusable firearm storage bags are designed for convenient access and long-term firearm preservation.
These products are distinct from contract-required, permanently sealed MIL-DTL-22020 bags. A reusable hook-and-loop closure should not be considered interchangeable with a specified heat-sealed military preservation package.
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Request a MIL-DTL-22020E VCI Bag Quote
Arms Preservation Inc. welcomes inquiries from military organizations, government contractors, manufacturers, distributors, and industrial customers seeking MIL-SPEC corrosion-prevention packaging.
To help us evaluate your packaging requirements, please provide the following information when available:
- Applicable military specification and revision
- Required bag type and material classification
- Inside bag dimensions (width and length)
- Estimated order quantity
- Required military preservation method
- Metal types and components being packaged
- Special marking or labeling requirements
- Certificate or documentation requirements
- Desired delivery date and shipping destination
API can review custom packaging requests and determine appropriate MIL-DTL-22020E-conforming bag options.
Contact Arms Preservation Inc. for a Custom Quote →
Frequently Asked Questions About MIL-DTL-22020E
What is MIL-DTL-22020E?
MIL-DTL-22020E is a U.S. military detail specification establishing the requirements for finished transparent, flexible, sealable VCI-treated bags used in military preservation applications.
Can Arms Preservation Inc. supply MIL-DTL-22020E-conforming bags?
Yes. Arms Preservation Inc. can offer bags that conform to MIL-DTL-22020E, including Type I heat-sealable configurations. Customers can submit their required dimensions, quantities, and preservation requirements for quotation.
What is the difference between MIL-DTL-22020 and MIL-PRF-22019?
MIL-DTL-22020 establishes requirements for finished VCI bags, while MIL-PRF-22019 establishes performance requirements for the VCI-treated material used to manufacture them.
What does MIL-DTL-22020 Type I mean?
Type I refers to heat-sealable VCI bags manufactured from MIL-PRF-22019 Type I material. These bags are designed to be sealed using appropriate heat-sealing equipment.
What does Class 2 mean?
Class 2 refers to light-duty MIL-PRF-22019 Type I material measuring less than 0.005 inch thick. It is a material classification rather than a separate MIL-DTL-22020 bag class.
Which military preservation methods use MIL-DTL-22020 bags?
MIL-STD-2073-1 identifies MIL-DTL-22020 VCI bags for appropriate applications under Methods 31 and 33. The standard also addresses the use of VCI-treated materials under other preservation methods.
Are MIL-DTL-22020 bags watervaporproof?
A MIL-DTL-22020 designation does not automatically establish compliance with a separate watervaporproof packaging requirement or a particular MVTR target. When additional moisture barrier performance is required, the relevant barrier material and finished-bag specifications must also be evaluated.
Do MIL-DTL-22020 bags require oil, grease, or desiccants?
VCI preservation can protect properly prepared compatible metal surfaces without heavy contact-preservative coatings. MIL-STD-2073-1 establishes specific restrictions on contact preservatives when VCI preservation is selected. Desiccant requirements depend on the prescribed preservation method and should not be changed contrary to the governing instructions.
Can MIL-DTL-22020 bags protect ferrous and nonferrous metals?
VCI formulations vary in their compatibility with different metals. Protection of steel, aluminum, brass, copper, or other materials must be evaluated against the selected VCI formulation and applicable military preservation requirements.
Can API provide custom MIL-DTL-22020 bag sizes?
API can review custom MIL-DTL-22020E packaging requirements, including Type I heat-sealable bags in customer-specified dimensions. Availability, manufacturing requirements, and lead times are confirmed during quotation.
How long does VCI corrosion protection last?
The effective protection period depends on the VCI material, packaging construction, sealing integrity, storage environment, and handling conditions. Any contract-specific protection duration should be supported by applicable material and finished-package documentation.
How do I request a MIL-DTL-22020E quote?
Contact Arms Preservation Inc. with the applicable specification, required bag type, dimensions, estimated quantity, preservation method, and delivery requirements. API can then evaluate appropriate conforming packaging options.
Military Specification References
For additional information, consult the applicable official military specifications and preservation standards:
- MIL-DTL-22020E: Transparent, flexible, sealable VCI-treated bags.
- MIL-PRF-22019E: Transparent, flexible VCI-treated barrier material.
- MIL-STD-2073-1: Standard Practice for Military Packaging.
- MIL-I-8574: Requirements for the use of volatile corrosion inhibitors.
- MIL-STD-3010: Test Procedures for Packaging Materials and Containers.
Current military specification revisions and associated requirements can be reviewed through the Defense Logistics Agency ASSIST QuickSearch database.
Military-Grade Corrosion Prevention Starts with Proper Packaging
Reliable corrosion protection requires more than simply placing a metal component inside a plastic bag. VCI chemistry, material compatibility, barrier characteristics, packaging construction, and sealing methods all contribute to successful preservation.
Arms Preservation Inc. can offer MIL-DTL-22020E-conforming VCI bags and related preservation packaging solutions for military, aerospace, and industrial applications.
Whether you require a custom VCI bag, specialized barrier packaging, or assistance evaluating military preservation requirements, API welcomes the opportunity to discuss your project.
Request a Quote from Arms Preservation Inc. →
Arms Preservation Inc. | CAGE Code: 99BK6 | Proudly Made in the USA
Technical information is provided for general reference. MIL-DTL-22020E conformance applies to the specific packaging configuration supplied under the applicable order requirements and does not imply that all Arms Preservation Inc. products meet this specification. Contract documents and current military specifications govern.