Description
Cor-Pak® 1-MUL is Cortec’s toss-in VpCI® pouch for small packages: a 2.5″ × 2.75″ breathable nonwoven-fabric pouch of multimetal vapor-phase corrosion inhibitor powder that protects up to 1 ft³ (28 L) of enclosed space for up to 24 months. The VpCI vaporizes through the membrane, spreads through the package air and adsorbs on every metal surface as a molecular layer; the powder stays inside the pouch, so there is no dust on the parts and nothing to clean off at unpacking. It is approved for military use under NSN 6850-01-470-2737.
The 1-MUL pouch protects carbon steel, stainless steel, galvanized steel, aluminum and its alloys, and copper and its alloys, so mixed-metal hardware can share one box. Because the protective layer is self-replenishing, a package can be opened for inspection and resealed without losing protection, and parts can ship to the end customer with the pouch still inside. The VpCI powder is a commercial equivalent to MIL-I-22110C, and the pouch is listed under GSA 8030-01-208-1769. In the Cortec Product Consultation Guide Cor-Pak 1-MUL is rated 1, enclosed: it works inside a sealed bag, box or container, not on an open shelf. It replaces oil dips and wax papers on small parts, and it suits automatic insertion on a packing line where a loose tablet or a foam square would not survive handling.
Typical applications
- Completed assemblies, parts and components
- Parts in antistatic packages
- Motors and mechanical controls
- Precision machined or stamped parts
- Marine and commercial electronic equipment
- Electrical equipment and controls
- Tools, spare parts and hardware kits
- Corrugated boxes, plastic wrap or bags, wood or metal containers
How to use Cor-Pak 1-MUL
- Start with clean, dry parts. Wash off coolant, fingerprints and salts and dry completely; the pouch has desiccant and VpCI action, but it cannot fix standing water or process residue left on the metal.
- Size the dose. One pouch per 1 ft³ (28 L) of package volume: one per 12″ cube or shoebox carton, two in a 12″ × 12″ × 24″ box. For 8 ft³ cartons move up to the Cor-Pak 8 ft³ pouch, and use two pouches per volume for aggressive marine or overseas conditions.
- Insert without opening. Drop the pouch in by hand or from an automatic dispenser; placement is not critical as long as it shares the air space with the metal and nothing solid blocks the vapor path.
- Close and seal the package shortly afterward. Seal the VpCI-126 bag, tape the carton or close the container; a sealed enclosure with minimal free air holds the VpCI concentration.
- Allow the void to saturate. The inhibitor charges the air space and condenses on every metal surface within about a day. After shipping, keep the package closed for about 24 hours after it arrives so it can acclimate to the building before it is opened.
- Reopen and reclose as needed. The molecular layer is replenished by continuous vapor protection once the package is reclosed; protection is up to 24 months.
- Return to service. Remove the part; no degreasing or cleaning is required. Discard the pouch.
- Store unused pouches sealed. Keep the carton closed, indoors and out of direct sunlight at 40 to 100 °F (4 to 38 °C); Cortec gives Cor-Pak pouches a 2-year shelf life.
Combining with other VpCI packaging
The standard small-package system is a VpCI-126 Blue zip bag or heat-sealed 126 bag with a Cor-Pak 1-MUL pouch inside, or a plain corrugated box lined with VpCI-146 paper and one pouch on top of the load. For kitted hardware that ships loose in a carton, VpCI-143 paper squares or Cor-Pak tablets give a finer dose per compartment. Parts should be clean and dry before they are packaged; see the Build-All and Magido aqueous parts washers, and where parts sit for more than a day or two before packaging, a water-based rust preventative such as VpCI-377 bridges the gap.
Where it fits in the Cortec line
Cortec’s insert ladder is dosed by volume: Cor-Pak tablets at 0.25 ft³ each, Cor-Pak 1-MUL pouches at 1 ft³, the Cor-Pak 8 ft³ pouch, and the 35 ft³ powder pouches, VpCI-308 for all metals including copper and bronze and EcoPouch (VpCI-609 Bio) for ferrous metals and aluminum. Desicorr VpCI adds desiccant capacity where humidity is the driver; the VpCI-130 series foams and BioPad are the flat-pad alternatives with ten times the VpCI loading of paper; VpCI-101 and VpCI-111 are the self-stick emitters for electrical cabinets. Browse the full Cortec VpCI line or the VpCI product selection guide.
Field notes
A Milwaukee, Wisconsin motorcycle plant had rust in manufacturing, in international shipment of semi-assembled machines and in service-parts storage. VpCI-126 bags now line the Gaylord boxes, VpCI-146 paper interleaves the parts and VpCI-132 foam emitters complete the pack, with Cor-Pak 1-MUL pouches for long-term service parts; the program went plant-wide. (Cortec Case History #546)
A Louisiana shipyard needed 4 to 6 weeks of internal protection for a hydraulic tank but could not compatibility-test a liquid rust preventive against the customer’s fluid in the 7 days available, and the tank would be welded, not cleaned, before filling. VpCI-308 pouches tethered inside during shipping and welding, removed before fill, delivered it rust-free. (Cortec Case History #774)
A Grand Rapids, Michigan mold shop shipped a 40,000 lb two-cavity P20 injection mold to Europe needing 5 to 6 weeks of protection: mold set on a cut sheet of MilCorr, cavity and core lightly sprayed with EcoAir tool-and-die rust preventive, one VpCI-309 pouch inside, then closed, locked and shrink-wrapped. No corrosion, and the cost was about half that of grease or oil. (Cortec Case History #626)
Specifications
| Protects | Up to 1.0 cubic foot (28 L) per pouch |
|---|---|
| Protection | Up to 24 months |
| Metals | Carbon steel, stainless steel, galvanized steel, aluminum and alloys, copper and alloys |
| Function | VpCI emitter with desiccant action; non-dusting |
| Pouch material | Breathable, nonwoven fiber fabric; do not open |
| Pouch size | 2.5″ × 2.75″ (6.35 × 6.99 cm) |
| Standards | VpCI powder is a commercial equivalent to MIL-I-22110C; Federal Standard 101; ARDEC Technical Report 99-05 |
| Listings | NSN #6850-01-470-2737; GSA 8030-01-208-1769 |
| Consultation guide rating | 1 – enclosed (sealed bag, box or container) |
| Application | Insert manually or automatically; close and seal the package shortly afterward |
| Removal | Remove pouch; no cleaning required |
| Storage | Original packaging, indoors, out of direct sunlight, 40–100 °F (4–38 °C); shelf life 2 years |
| Size | 300 pouches per carton |
| Shipping weight | 10 lb (4.5 kg) |
| Availability | In stock |
| Cortec product number | 10500016 |
Solvent Recycling Systems is an authorized Cortec® distributor. See the full Cortec VpCI line, browse the VpCI product selection guide, or contact us for volume pricing and lead times.
