MIL-D-3464 Desiccant – Royco Packaging

MIL-D-3464 specifies packaged desiccants used to control humidity in sealed military preservation environments. It establishes performance and packaging requirements so the desiccant can adsorb moisture without introducing corrosion or other harmful effects inside the package. Royco Packaging stocks certified MIL-D-3464 activated-clay desiccants in multiple unit sizes for storage and transit applications. These products are used to help prevent rust, corrosion, mildew, and moisture-related damage in electronics, instruments, machinery, and other sensitive items. Royco can also supply the barrier materials, VCI wraps, heat-sealable pouches, and corrugated containers commonly used with desiccants as part of a complete MIL-STD-2073 preservation system.

Royco Packaging states that its MIL-D-3464 desiccants are QPL-approved and domestically manufactured. QPL status is important in military procurement because it indicates that the applicable product or source has been qualified under the specification’s testing and approval process. Royco stocks Type I and Type II options and supports orders with the documentation needed for traceability and compliance. Customers should still verify that the exact part number, unit size, and type match the contract or packaging instruction, since QPL approval is tied to specific products rather than a generic product category. Royco’s packaging specialists can help confirm the required desiccant and any complementary barrier materials before the order is placed.

Royco Packaging’s MIL-D-3464 range covers several unit sizes to support both compact packages and larger preservation projects. Current offerings include 1/6-unit, 1/3-unit, 1/2-unit, 1-unit, 2-unit, 4-unit, 8-unit, and 16-unit desiccant packs, with Tyvek® and non-woven formats depending on the size and product. Smaller packets are useful for electronics, instruments, and limited headspace, while larger unit bags can serve substantial sealed enclosures. The correct quantity is determined by package volume, barrier performance, storage duration, environmental exposure, and the applicable preservation method. Royco can help customers calculate or interpret the unit requirement for a military packaging program.

Yes. MIL-D-3464 desiccants are commonly paired with MIL-PRF-131 watervaporproof barrier materials in military preservation systems. The barrier limits moisture vapor entering the package, while the desiccant removes moisture from the enclosed air and materials after the package is sealed. This combination is particularly important in MIL-STD-2073 Method 50 applications, which use watervaporproof protection together with desiccant and often a humidity indicator. Royco Packaging supplies MIL-D-3464 desiccants, MIL-PRF-131 rolls and pouches, SpecPack barrier bags, and related humidity-control products, allowing procurement teams to source the major elements of the preservation system from one supplier.

Tyvek® and non-woven MIL-D-3464 desiccant packs differ primarily in the packet or bag material and the size/application in which Royco offers them. Royco’s smaller activated-clay desiccant units are commonly available in Tyvek® paks, which provide a strong, breathable enclosure for the sorbent. Larger formats, including 16-unit bags, are available in non-woven constructions suited to higher-capacity preservation packages. Both formats are intended to allow water vapor to reach the desiccant while retaining the active material. The correct choice should follow the listed MIL-D-3464 product, unit requirement, and contract specification. Royco’s specialists can help match the pack construction and capacity to the package.