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ZERUST® ZAK-M22 Vapor Capsule

ZERUST®/EXCOR® ZAK-M22 Vapor Capsule is a portable VCI capsule containing proven ZERUST® Vapor Corrosion Inhibitor Technology (VCI). Use to protect metals in hard-to-reach areas of control panels, electrical cabinets, and other enclosed spaces, even when they are in operation. Furthermore, use it as a supplement to other ZERUST® VCI packaging products for added protection.



  • Fast-acting VCI protection
  • Unique QR code on every capsule and ZERUST® ZAP App allows users to manage deployed capsules
  • Multimetal protection that neutralizes contaminants
  • Does not affect the circuit boards or sensitive components*
  • Suitable for new equipment and to protect the reliability of existing equipment
Product Description

Product Description

ZAK-M22 VCI capsule is quick and easy to install. Simply peel back the protective paper from the adhesive tape and install it securely in the desired location. Next, tightly seal the enclosure to trap protective vapor inside. Additionally, each capsule has a unique serial number and QR code printed on the label. This feature, used along with the ZERUST® ZAP App, allows the user to be notified of the initial installation location and replacement schedule. Visit www.zerust.com/resources/apps for more information or to download the App.

ZERUST® ZAK-M22 Vapor Capsule diffuses invisible, odorless, and non-toxic ZERUST® VCI molecules that quickly settle onto exposed metal surfaces inside the packaging or enclosure and effectively neutralize contaminants. Once removed from the packaging or enclosure, the VCI will dissipate from the metal surfaces, allowing immediate painting, welding, or further processing. Furthermore, ZAK-M22 Vapor Capsule protects multiple metal types from rust and tarnish for up to 2 years, depending on the environment in a sealed enclosure.

ZERUST® ZAK-M22 Vapor Capsule Protection Information

Product Name
Normal Environment**
(below 0.2 ppm SO2)
Aggressive Environment**
(at or above 0.2 ppm SO2)
Volume of Protection (Up to) Protection Radius (Up to) Duration of Protection (Up To) Volume of Protection (Up To) Radius of Protection (Up To) Duration of Protection (Up To)
ZAK-M22 35 ft³ (1 m³) 2 ft (60 cm) 2 years in
tightly sealed enclosure
3.5 ft³ (.1 m³) .2 ft (6 cm) 1 month in a tightly sealed enclosure


Why Choose ZERUST®?

For over 50 years, beginning with the invention of Vapor Corrosion Inhibiting (VCI) film, ZERUST® has led the market in quality corrosion solution products. Furthermore, we dedicate ourselves to providing expert corrosion management services and further adding solutions for our customers. In addition, ZERUST® users have access to on-site support from ZERUST®/EXCOR® representatives in more than 70 countries. As a result, our customers have peace of mind when they choose ZERUST® for corrosion control management.



ZERUST®/EXCOR® ZAK-M22 Vapor Capsules are in stock for immediate delivery and sold in cases. For further ordering information, contact your ZERUST®/EXCOR® representative.

Product Name Part Number Quantity
ZAK-M22 375-M-00202 10/Case

Frequently Asked Questions

How do VCI emitters work?
What is VCI?
How do VCI products prevent corrosion?
How does moisture affect the performance of VCI?
How does VCI compare to desiccants in preventing corrosion?
Does VCI affect electronics, plastics, rubber, wood or other non-metallic surfaces? 
What can be anticipated when parts that are already corroded are packaged in VCI products?
What can be anticipated when wet parts are packaged in VCI?
Does VCI have any effect on electrical or electronic components?
Are there any inhalation or contact risks with VCI products?
Does ZERUST® have military approvals for VCI?
What is the best way to store VCI products before use?
How is corrosion prevented?
How does VCI work?
What does VCI stand for?
What is the difference between volatile corrosion inhibitors and vapor corrosion inhibitors (VCI)?