MIL-PRF-131 barrier materials are the Department of Defense’s performance standard for moisture- and corrosion-resistant packaging. These watervaporproof, greaseproof, and heat-sealable laminates provide exceptional protection for sensitive equipment and components in long-term storage, shipment, or export.
The current MIL-PRF-131L (April 2022) specification supersedes MIL-PRF-131K, ensuring consistent, tested performance across all military and industrial applications. Available in multiple constructions — including Class 1 (plastic-backed, non-woven) and Class 3 (scrim-backed, woven fabric) — these materials combine low water vapor transmission rates, durability, and superior seal integrity for mission-critical preservation.
Read the full specification here
Class 1 materials are offered in a variety of forms, including Tyvek® and nylon foil laminations, providing lightweight strength, excellent tear resistance, and flexibility for a broad range of packaging applications.
Royco Packaging stocks MIL-PRF-131 materials in rolls, pre-made pouches, and tubing of multiple sizes for immediate shipment. We also custom convert to meet your specific project requirements. Contact our expert sales team with your project requirements.
For expert assistance or bulk pricing, call 1-877-MIL-SPEC and speak with one of our experienced packaging specialists. Pair MIL-PRF-131 materials with MIL-D-3464 desiccants, VCI wraps, and MIL-PRF-121 barrier papers for a complete corrosion-control system.
Royco Packaging — Mission Critical Protection. Made in the USA.
