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Cortec CorPak® 1-MUL/8-MUL VpCI® Desiccant Packs

Cortec CorPak® 1-MUL/8-MUL VpCI® Desiccant Packs

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CorPak®1-MUL/8-MUL desiccant packs contain a market leading VPCI® Vapor Phase Corrosion Inhibitor.

This gives optimal protection for precious or moisture sensitive cargo travelling through the supply chain.

CorPak®1-MUL/8-MUL desiccant packs are a patented design containing Cortec Corporations renowned & market leading VPCI® (vapour phase corrosion inhibitor) powder technology.

This product provides corrosion and rust protection for both ferrous and non-ferrous metals contained within a package. The sophisticated VPCI formula essentially evaporates and escaped through the desiccant packs breathable Tyvek® membrane. It is then absorbed, bonding itself to the metal surface areas within the enclosure. This then forms a protective molecular layer that acts as a rust inhibitor throughout the life span of the pouch.

Focus features of the CorPak 1-MUL/8MUL desiccant packs

What are the benefits of CorPak® 1-MUL/8-MUL desiccant pouches

  • ‘Best in class’ vapour phase corrosion inhibitor technology reaches all awkward & difficult to reach surfaces.
  • The VPCI molecular layer formed upon application does not require removal.
  • Degreasing and cleaning is not required.
  • No down time for protected parts, components and equipment’s. You can use them immediately after the introduction of Corpak VPCI pouches.
  • VPCI molecular layer will self-generate in order to provide to continuous protection. This is very reassuring if you think the package or enclosure will be opened at any point.
  • Can be inserted or dropped in to packages very easily, either manually or automatically using a variety of packaging machinery.

What metal can be protected?

  • Carbon based Steel
  • Stainless Steel
  • Galvanised Steel
  • Aluminium and it’s alloys
  • Copper and it’s alloys

Applications for CorPak 1-MUL desiccant packs

These VPCI desiccant pouches are designed to protect products and equipment’s including assemblies, parts and components. They can be used with all manner of protective packaging formats including plastic bags, corrugated cardboard boxes, foil bags as well as wood and metal containers.

Projects include:

  • Anti static packaging parts and components.
  • Motor assemblies
  • Electronics equipment
  • CNC milled precision parts
  • Delicate mechanical control panels
  • Marine navigation equipment

Simply either manually or automatically insert the Cor-Pak desiccant pouches into the package. Then simply close and seal!

Available in 2 sizes either:

  • Cor-Pak 1-MUL pouch – provides corrosion protection up to 1.0 cubic foot or 28 litres.
  • Cor-Pak 8-MUL pouch – provides corrosion protection up to 8.0 cubic foot or 0.23 mtr³

*Please note – Tyvek® is a registered trademark of DuPont™ or its affiliates. Copyright© 2020 DuPont™ de Nemours Inc. 

Product Specifications (.PDF)

Frequently Asked Questions

• What exactly are Cortec VpCI Desiccant Packs and how do they differ from regular desiccants?

Cortec VpCI Desiccant Packs are a truly innovative two-in-one solution for corrosion prevention, containing a unique combination of a powerful desiccant and Cortec's advanced Vapor phase Corrosion Inhibitor (VpCI) technology. Unlike conventional desiccants that only absorb moisture, these packs also release a protective vapor that forms an invisible shield on metal surfaces, actively preventing rust and corrosion even in hard-to-reach areas.

• How does the dual-action technology in Cortec VpCI Desiccant Packs actually work?

The magic lies in their synergistic action. The desiccant component diligently works to reduce the humidity levels within an enclosed space, removing moisture from the air. Simultaneously, the VpCI molecules vaporize and then condense onto all accessible metal surfaces, creating a molecular barrier that halts the corrosion process by blocking oxygen, moisture, and other corrosive elements from attacking the metal. This dual protection ensures comprehensive rust prevention.

• What types of metals can Cortec VpCI Desiccant Packs protect?

These versatile packs are designed for multi-metal protection, meaning they can effectively safeguard both ferrous metals like steel and cast iron, as well as non-ferrous metals such as aluminum, copper, brass, and galvanized steel. This makes them incredibly useful across a wide range of industries and applications.

• How long can I expect Cortec VpCI Desiccant Packs to provide corrosion protection?

When properly used in an enclosed package or container, Cortec VpCI Desiccant Packs can provide robust corrosion protection for up to two years, offering significant long-term preservation for your valuable items during storage and transit.

• Are Cortec VpCI Desiccant Packs considered environmentally friendly?

Yes, they are designed with environmental responsibility in mind. Cortec's VpCI technology is known for being non-toxic and free from harmful substances like chromates or nitrites, making these desiccant packs a safer and more eco-conscious choice for corrosion prevention compared to many traditional methods.

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• Where are Cortec VpCI Desiccant Packs typically used?

These desiccant packs are incredibly versatile and find widespread application in packaging various items such as completed assemblies, individual parts and components, motors, mechanical controls, precision machined or stamped parts, and even sensitive marine and commercial electronic equipment and tools. They are ideal for use in corrugated boxes, plastic bags or wraps, and both wood and metal containers.

• What's the best way to place a Cortec VpCI Desiccant Pack within a package?

For optimal protection, simply insert a Cortec VpCI Desiccant Pouch into the space you need to protect and then immediately close or seal the container. The VpCI vapors will disperse throughout the enclosure to protect all exposed metal surfaces.

• Do I need to clean or degrease metal parts before using Cortec VpCI Desiccant Packs?

One of the significant advantages of Cortec VpCI Desiccant Packs is that no degreasing or cleaning of the protected part is required before application. The VpCI technology works effectively on surfaces as they are, simplifying your packaging process considerably.

• How do I know which size of Cortec VpCI Desiccant Pack I need for my enclosure?

The size of the VpCI Desiccant Pack needed depends on the internal volume of the enclosure you wish to protect. For instance, a 1-unit Desicorr® VpCI® Pouch is designed to protect approximately 1 cubic foot (0.028 cubic meters) of enclosed space. It's crucial to select the correct unit size to ensure sufficient VpCI concentration and moisture absorption.

• Can I use Cortec VpCI Desiccant Packs if the package is likely to be opened and re-sealed multiple times?

Yes, you can! The VpCI barrier is self-replenishing. This means that even if the package is opened and resealed, the VpCI molecules will re-establish their protective layer on the metal surfaces, providing continuous corrosion protection.

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• Do Cortec VpCI Desiccant Packs need to be protected from direct sunlight or extreme temperatures during storage?

To maintain their effectiveness and ensure optimal shelf life, it's recommended to store Cortec VpCI Desiccant Packs in their original packaging, indoors, and out of direct sunlight, ideally within a temperature range of 40-100 °F (4-38 °C).

• Are these desiccant packs suitable for protecting delicate electronic equipment and electrical components?

Absolutely! Cortec VpCI Desiccant Packs are an excellent choice for protecting sensitive electronic and electrical equipment, as they prevent corrosion without altering the electrical or physical properties of the components. Their non-toxic nature makes them safe for such applications.

• Can Cortec VpCI Desiccant Packs be used for military packaging applications?

Yes, these desiccant packs are highly regarded and often used in military packaging, with some versions, such as the Cor-Pak® 1-MUL Pouches, being approved for military use under specific NSN numbers, signifying their robust performance and reliability in demanding environments.

• How do Cortec VpCI Desiccant Packs protect recessed or inaccessible metal surfaces?

The genius of the VpCI technology is that the corrosion inhibiting molecules vaporize and travel through the air, reaching all metal surfaces within the enclosed space, including those recessed or otherwise inaccessible areas that traditional contact inhibitors might miss.

• My products are going to be shipped overseas in varying climates. Will Cortec VpCI Desiccant Packs hold up?

Yes, they are specifically designed for robust performance in diverse and challenging environments, including those with varying humidity and temperature fluctuations experienced during overseas shipping. The dual action of moisture absorption and VpCI protection ensures your items stay protected.

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• Is there any residue left on the metal parts after using Cortec VpCI Desiccant Packs?

No, a key benefit is that the VpCI layer formed on the metal surface is invisible and molecularly thin. This means that once the metal part is removed from the package, the VpCI molecules dissipate, leaving no residue and ensuring the component is immediately ready for use without any need for cleaning or degreasing.

• Can Cortec VpCI Desiccant Packs prevent galvanic corrosion between dissimilar metals?

Yes, the comprehensive multi-metal protection offered by Cortec VpCI Desiccant Packs extends to preventing galvanic corrosion, which occurs when two dissimilar metals are in contact in the presence of an electrolyte. The VpCI layer acts as a barrier to prevent this interaction.

• What are the common unit sizes available for Cortec VpCI Desiccant Packs?

Cortec VpCI Desiccant Packs, such as the Desicorr® VpCI® Pouches, are typically available in various unit sizes to accommodate different enclosed volumes. Common sizes include 1/6 Unit and 1 Unit, with larger non-windowed (NW) versions available in 4 Unit and 8 Unit sizes.

• Do the desiccant packs have an indicator to show when they are spent?

Yes, the windowed version of Cortec Desicorr® VpCI® Pouches features indicator spheres that will change color, typically from yellow to green, to visually signal when the desiccant portion of the pouch is fully spent and has absorbed its maximum moisture capacity.

• What is the typical moisture absorption capacity of a Cortec VpCI Desiccant Pack?

For example, a 1-unit Desicorr® VpCI® Pouch is designed to absorb 1.65 grams of water, ensuring effective moisture control within the protected enclosure. This capacity can vary depending on the specific unit size.

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• Are Cortec VpCI Desiccant Packs dusty or fibrous?

No, a key advantage of these particular packs is that they are designed to be non-dusting and lint-free, making them suitable for sensitive applications where cleanliness is paramount.

• What is the typical shelf life of an unopened package of Cortec VpCI Desiccant Packs?

When stored correctly in their original, sealed packaging, Cortec VpCI Desiccant Packs generally have a shelf life of up to two years, ensuring you have ample time to utilize them.

• How do Cortec VpCI Desiccant Packs offer better protection than standard desiccants alone?

Standard desiccants only tackle moisture, which is just one factor in corrosion. Cortec VpCI Desiccant Packs go further by not only absorbing moisture but also releasing VpCI molecules that directly inhibit the electrochemical reactions that cause rust, providing a far more comprehensive and active form of corrosion protection.

• Can these desiccant packs reduce overall packaging costs?

Yes, by providing superior and long-lasting corrosion protection, Cortec VpCI Desiccant Packs can significantly reduce the need for messy, labor-intensive rust preventatives like oils and greases. This eliminates the need for cleaning or degreasing upon arrival, saving both time and labor costs throughout the supply chain.

• Is it possible to reuse Cortec VpCI Desiccant Packs?

While the desiccant component has a finite absorption capacity, the VpCI technology itself is self-replenishing. However, once the desiccant indicators change color, it's generally recommended to replace the pack to ensure continued optimal moisture absorption and corrosion protection.

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• What are the environmental benefits of choosing Cortec VpCI Desiccant Packs over older corrosion prevention methods?

Cortec VpCI Desiccant Packs are a more environmentally conscious choice because they are non-toxic, do not contain heavy metals or nitrites, and often eliminate the need for hazardous oil coatings or other messy rust preventatives that require costly and complex disposal.

• Do Cortec VpCI Desiccant Packs meet any specific industry or military specifications?

Yes, these desiccant packs are commercially equivalent to MIL-D-3464E, Type I & Type II, which demonstrates their high standards of performance and suitability for demanding applications, including those within the military sector.

• Where can I purchase genuine Cortec VpCI Desiccant Packs in the UK?

You can purchase genuine Cortec VpCI Desiccant Packs from authorized distributors like Valdamark Direct in the UK, ensuring you receive authentic products that meet Cortec's stringent quality standards.

• What kind of packaging are Cortec VpCI Desiccant Packs supplied in?

Cortec VpCI Desiccant Packs are typically supplied in cartons, such as cartons of 300 units for certain sizes, ensuring they are protected and easy to handle before use.

• Where can I find the technical data sheet (TDS) and safety data sheet (SDS) for Cortec VpCI Desiccant Packs?

Reputable suppliers like Valdamark Direct will typically provide access to the technical data sheet (TDS) and safety data sheet (SDS) for Cortec VpCI Desiccant Packs on their product pages, often available for download, to provide comprehensive information on performance, handling, and safety.

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