MIL-PRF-121 is a US military performance specification pertaining to heat-sealable, greaseproof, waterproof, flexible barrier material used for the preservation of military supplies and equipment. The current specification is MIL-PRF-121G, which supersedes MIL-B-121. The specification is further divided into Type 1 & Type 2 material. Prior versions of the MIL-B-121 spec included Grade and Class designations that, while no longer officially listed, are still used by many customers.
Royco Packaging stocks MIL-PRF-121 material in rolls, pouches (bags), and tubing of various sizes for immediate shipment. We can also convert MIL-PRF-121 to any custom size needed for your project. Call us at 1-877-MIL-SPEC and one of our product specialists will be happy to assist you.