Arms Preservation Inc. VCI Gun Storage Bags vs. Other VCI Bags
Quick answer: API’s multi-layer 8-mil VCI bags beat thin single-layer bags. An exterior barrier resists oxygen and moisture. Protection lasts longer, and the bags are tougher. A reusable hook-and-loop closure speeds access.
Why Most VCI Bags Aren’t the Same
Thickness and durability. Many single-layer VCI bags use ~4-mil poly. API uses an 8-mil multi-layer film. Thicker film resists tears and punctures during storage.
External barrier layer. API adds an exterior barrier over the VCI layer. The barrier helps keep VCI inside the bag. It also slows oxygen and moisture ingress.
Closure and reuse. API bags close with heavy-duty hook-and-loop. You do not need tape or heat tools. Open, access gear, and reseal quickly.
How Long Do They Last?
With proper use, API bags protect for 5+ years. Protection can reach ~10 years with infrequent opening and stable storage. Basic single-layer poly bags typically last 2–3 years.
API vs. Other VCI Bags — Side by Side
| Feature | API Multi-Layer VCI Bags | Single-Layer Poly VCI Bags |
|---|---|---|
| Film construction | Multi-layer with exterior barrier | Single-layer polyethylene |
| Total thickness | ~8 mil (0.008") | ~4 mil (0.004") |
| Barrier to O2/moisture | Barrier limits permeation | Higher permeation through basic poly |
| VCI retention | Designed to keep VCI inside | VCI can off-gas through film |
| Closure | Reusable hook-and-loop | Tape, ties, or heat seal |
| Expected protection | 5+ years; up to ~10 years with rare openings | ~2–3 years |
What VCI Does
VCI molecules release inside the sealed bag. They adsorb onto metal surfaces, including tight internals. When you remove the item, the molecules dissipate. No messy oils or greases are required.
Compatibility and Safety
API VCI treatment is non-abrasive. It is compatible with common firearm finishes and coatings. It is also friendly to optics, wood stocks, and polymer frames.
How to Use
- Unload the firearm.
- Clean and dry the metal surfaces.
- Remove fingerprints and residue.
- Place the item in the right bag size.
- Seal fully with the hook-and-loop flap.
- Store in a stable, climate-controlled area.
- Avoid unnecessary openings during long storage.
When to Choose API
- You want longer service life from a reusable bag.
- You need rugged film for real storage conditions.
- You prefer tool-free access and reseal.
Shop Proven Sizes
Choose a size that fits your gear.
Learn More
See how VCI works in practice on our How It Works page. Visit our FAQ for care and reuse tips.
FAQ
How long will a bag last? API bags deliver 5+ years with normal use. They can reach ~10 years when rarely opened. Single-layer poly options average 2–3 years.
Do I still need oils or desiccants? No. VCIs protect dry metal surfaces without oily residues. Separate moisture absorbers are not required.
Is it safe for optics, finishes, and wood? Yes. It is compatible with optics, bluing, Cerakote, and wood.
Can I reuse the bag? Yes. The hook-and-loop closure supports many cycles. Keep the bag clean and undamaged for best results.
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