Moisture-proof Aluminum Foil Bag | 7-Micron Barrier Film

Our moisture-proof aluminum foil bag is specifically engineered to protect electronics components and industrial products from moisture damage during storage, transit, and long-term inventory holding. Combining a near-zero Water Vapor Transmission Rate (WVTR) aluminum foil core with a hermetic heat-seal closure, these bags provide the highest level of moisture protection available in flexible packaging.

Moisture damage is one of the most pervasive and costly failure modes in electronics manufacturing. In Southeast Asia’s tropical climate — where ambient humidity regularly exceeds 80% — the risk is amplified. Without proper moisture barrier packaging, electronic components absorb atmospheric moisture during storage, leading to corrosion of metal contacts, delamination of PCB substrates, and the “popcorn effect” during reflow soldering, where trapped moisture vaporizes explosively and damages components.

Key Features

Near-zero Water Vapor Transmission Rate

The aluminum foil core delivers a WVTR of less than 0.01 g/m²/24hr — near-zero moisture transmission that keeps packaged components dry regardless of external humidity levels. This is the defining advantage of aluminum foil over all plastic-based packaging alternatives.

Hermetic Heat-Seal Closure

A properly executed heat seal eliminates any pathway for moisture ingress through the bag opening. Combined with the near-zero WVTR of the foil laminate, a sealed moisture-proof bag creates a controlled dry environment around the packaged component.

Compatible with Desiccant

For components with high moisture sensitivity classifications (MSL 2 and above per JEDEC J-STD-033), including a silica gel desiccant packet inside the sealed bag actively removes any residual moisture, maintaining internal relative humidity below 10%.

Humidity Indicator Card Compatible

Humidity indicator cards (HICs) can be included inside sealed bags to provide visual confirmation of bag integrity at the point of opening — standard practice for moisture-sensitive device packaging in professional electronics manufacturing.

Tropical Climate Optimized

Designed and tested for the humidity conditions common across Vietnam, Thailand, Malaysia, Singapore, and Indonesia — where inadequate moisture barrier packaging results in significantly higher component failure rates than in temperate climates.

Applications

Moisture-proof aluminum foil bags are essential for packaging moisture-sensitive surface-mount devices (SMDs), IC packages, BGA components, and PCB assemblies prior to reflow soldering. They are also widely used for long-term storage of spare parts and MRO inventory, ocean freight packaging of electronics components, and protecting optical instruments and precision measurement equipment from humidity-related degradation.

For electronics manufacturers and industrial suppliers operating in Southeast Asia’s tropical climate, moisture-proof aluminum foil bags are not optional protective packaging — they are the minimum viable specification for any component sensitive to humidity exposure during storage or transit.

Frequently Asked Questions

Q: What moisture sensitivity levels require sealed moisture barrier packaging?

Under JEDEC J-STD-033, components classified at MSL 2 and above require sealed moisture barrier packaging with desiccant for storage. MSL 1 components are not moisture-sensitive and do not require sealed bags. Check your component manufacturer’s datasheet for the specific MSL classification.

Q: How long can components be stored in a sealed moisture-proof bag?

When properly heat-sealed with appropriate desiccant, components can be stored for 12 months or more while maintaining moisture protection. For long-term storage beyond 12 months, reseal with fresh desiccant.

Q: How do I know if a bag seal has been compromised?

Including a humidity indicator card inside the sealed bag provides visual confirmation. A color change on the HIC indicates moisture ingress and alerts the user to inspect before use.

Q: Are custom sizes available?

Yes. All dimensions custom manufactured. Small batch orders welcome.

Contact Mavis for moisture barrier packaging specifications: mavisv.com/contact