MIL-PRF-121 Type II Barrier Material

MIL-PRF-121 Type II barrier material is a U.S. military specification-approved laminate engineered for moisture, vapor, and grease protection in mission-critical preservation and export packaging applications. Manufactured with 40-pound natural kraft paper laminated to polyethylene, this material combines flexibility, durability, and heat-sealability in a lightweight structure. Designed for wrapping, interleaving, and lining sensitive equipment, metal components, and industrial products, MIL-PRF-121 Type II provides dependable resistance to water, oil, and environmental contaminants—making it a trusted solution for defense, aerospace, and manufacturing operations. Typical Properties: Specification: MIL-PRF-121G, Type II Construction: 40# Natural Kraft Paper / Polyethylene Yield: 6,450 in²/lb (Calculated) Tensile Strength: >17 lbs/in (ASTM D882) Tear Strength: >100 grams (ASTM D1922) Burst Strength: >30 psi (MIL-PRF-121G) Seal Strength: >4 lbs/in (ASTM F88) Suggeste