Our cocoons contain a poly packaging film with VCI (Vapor Corrosion Inhibitor) chemistry. We feel it is important that our customers understand what VCI technology is and how it sets our products apart from other competitors' products available on the market. This technology is not new, but new to this particular market, and we are here to make it available to those of you who appreciate the very best for your car and motorcycle. 

Thanks for taking the time to learn more.

What Is VCI Technology?

Vapor Corrosion Inhibitor (VCI) technology is a patented technology that provides optimum protection against rust, corrosion and oxidation in targeted areas. VCIs are substances that release chemical compounds within a sealed airspace that actively prevents surface corrosion. This technology has been used by the Military, NASA, and the Automotive Industries since 1977.

How Does VCI Technology Work?

Corrosion on metal is a result of oxidation – a molecular, destructive reaction between oxygen and a metal surface. When VCI molecules are released into the air, they vaporize and become attracted to metal surfaces.  A thin transparent film forms about 1 or 2 microns thick and prevents the interaction of air and moisture from reaching the surface, thereby preventing rust and corrosion that would result otherwise. The compounds that VCIs release into an airspace actively prevent corrosion by forming strong bonds with a metal surface, promoting and maintaining the natural and healthy passive oxide layer on the metal. 

How Long Does It Take For The VCI Vapors To Start Working? 

The length of time can vary depending on what VCI product you are using. For instance, all liquid and aerosol products have VCIs in them. Once they are applied to a metal surface, the contact is immediate. These VCIs will migrate to all metal surfaces once the vehicle is placed inside the cocoon and will begin to provide lasting corrosion protection within a few hours. VCI technology works in both the liquid and vapor phase. This is what sets our product apart from any other rust preventatives on the market today.

Does This Mean the Vapors Will Go Wherever Air & Moisture Go? 

Exactly! That’s the advantage of this technology. Any metal surface is protected from moisture molecules attacking the surface. As dust is drawn to a computer screen, VCI vapors will react similarly when near a metal surface. During the bonding process and due to VCI vapor molecules bearing a heavier weight than moisture, the vapors will push their opponent off the metal surface, thereby displacing the moisture molecule. Even the tightest crevices where liquids are unable to reach, VCI vapors will, protecting all metal surface areas that are exposed to air and moisture.

Does It Matter the Type of Surface? Painted vs. Un-Painted?

No. The VCI molecules work with all metal surfaces: chrome, aluminum, cast iron, etc. with no effect on the appearance of the metal's surface. The VCI layer that forms is invisible, dry, and does not affect the physical properties or functionality of the metal in any way. The protected metal can be painted, treated and/or used without further cleaning.

How Long Will VCIs Last Inside The Cocoon? How Many Times Can The Cocoon Be Opened?

This depends on what harsh chemical contaminants are in the atmosphere surrounding the cocoon. However under normal circumstances (in a garage for instance) the cocoon would have to be opened and closed numerous times in order for the vapors to be consumed in the contained space. Your cocoon will serve you with years of corrosion protection providing you maintain it properly, especially when not in use. We recommend zipping the cocoon closed--as to allow the VCIs to remain contained inside--and store in a container when not being utilized. We do not recommend leaving the cocoon open, as the VCIs have a natural chemical instinct to attach themselves to any metal object that may be found in your garage. This will decrease the longevity of the cocoon. 

What Is The Difference Between A Cocoon Compared To Other Covers or Storage Bags?

This is the question we get asked most often. Canvas, cloth, or polyethylene car/motorcycle bags or covers will not protect your car or motorcycle while stored. In fact, they accelerate rust and corrosion and act as a breeding ground by holding moisture and humidity in… not keeping it out.


Here is what sets our cocoons apart from other market items and why the military and automotive industry use this technology over mothball or other rust preventative products.... When the vehicle is enclosed in the cocoon, there may be water or moisture still present (for instance after washing and drying your vehicle). Hard to reach areas for example leave moisture to remain. The VCI molecules will migrate to the metal surfaces, displacing and bonding to the metal. This will prevent the two things that cause oxidation to begin in the first place; air and moisture. Best of all, should the molecules ever get scratched away, new vapor molecules will migrate to that surface, which forms a new electrochemical seal to protect it.


The cocoons are made of a three layered material: 1) Water resistant outer shell, 2) VCI Corrosion Inhibitor mastic forming the middle layer, and 3) the contact layer closest to your car/motorcycle is a soft spun polyolefin, non-abrasive lining that wicks away the moisture with exclusive capillary action. The breathable action allows the cover to let moisture escape out and not trap it in. The key that sets us apart from other car and motorcycle bags: The middle layer.

Cocoon Requirements

  • Guaranteed for Indoor Use Only (garage, shed or pole barn)

  • To help maintain the longevity of the VCIs in your cocoon, make sure your car or motorcycle is dry before storing. 

All statements, technical information and recommendations contained herein are based on tests. Corrosion Control LLC warrants that products will be free from defects when shipped to customer. Corrosion Control’s obligation under this warranty shall be limited to replacement of product that proves to be defective. To obtain replacement product under this warranty, the customer must notify Corrosion Control LLC of the claimed defect within ninety days after shipment of product to customer. All freight charges for replacement product shall be paid by customer. Corrosion Control LLC shall have no liability for any injury, loss or damage arising out of the use of, or the inability to use the products.

BEFORE USING, USER SHALL DETERMINE THE SUITABILITY OF THE PRODUCT FOR ITS INTENDED USE, AND USER ASSUMES ALL RISK AND LIABILITY WHATSOEVER IN CONNECTION THEREWITH. No representation or recommendation not contained herein shall have any force or effect unless in a written document signed by an officer of CORROSION CONTROL, LLC.


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