Most filaments are hygroscopic and absorb moisture from the air over time, which leads to stringing, bubbling, and weaker prints. Vacuum sealing removes air and moisture from around the spool, slowing that absorption and keeping filament in better condition for longer between prints.
The Air Pump + Vacuum Bag kit is designed for active vacuum sealing, drawing air out of the bag for the tightest, most moisture-resistant seal. Resealable bags are a simpler, reusable option without vacuum sealing, useful for quick storage between print sessions or for filaments that don’t need long-term airtight protection.
A manual air pump works well for occasional use and is the more affordable option. The USB electric vacuum pump is worth it if you’re sealing bags regularly, since it removes air faster and with less effort, particularly handy if you’re storing multiple spools at once.
Yes. Our vacuum bags are resealable, so you can open them to swap filament in and out and reseal them again, making them a practical long-term storage solution rather than a single-use option.
Adding a desiccant pack inside the bag alongside your filament further helps absorb any residual moisture, giving extra protection for humidity-sensitive filaments like nylon, PETG, or TPU during long-term storage.
No. Vacuum storage helps prevent moisture from building up in filament that’s already dry, but it won’t remove existing moisture from a spool that’s already absorbed it. If your filament is already showing signs of moisture damage, it needs drying first, then vacuum storage helps keep it that way.