Just gave my first go at vacuum-sealing a filament spool using the EIBOS pump and reusable bags. First impressions? Surprisingly quick and oddly satisfying.

A full guide and video covering how these pumps work, and long-term storage tips, will be coming soon to 3DWithUs.

UPDATE: Full guide is live.

Filament Vacuum Pumps & Reusable Bags: Complete Guide
✍ https://3dwithus.com/filament-vacuum-pumps-reusable-storage-bags
💬 Have you tried vacuum storage yet?

If you’ve tried vacuum-sealing your filament, share your results (and fails!) below.

Edited 3 hours ago3 hr by Max Funkner

Great attempt! I’ve been wondering whether it’s really necessary to get a filament dryer — have you ever used one?

I’ve tested a few filament dryers and always keep them handy. I would still recommend having a filament dryer available — especially if you live in humid regions like the UK, for example. Moisture is everywhere.

Let’s say you open a spool and leave it printing overnight. When you seal it back using a vacuum pump and desiccant dehumidifiers, that may not be enough to restore the humidity to ideal levels. In such cases, I recommend drying the filament before sealing it — when needed.

It also depends on the filament type. For some engineering-grade materials like PA12-CF, manufacturers even recommend using a filament dryer for a few hours before printing, including with brand-new spools.

Here’s my test with Inlogic PA12-CF and PA6-CF. Brand-new filament is dried in the SUNLU E2, then fed into the Creality K2 Plus via a PTFE tube. Maybe overkill — but I got beautiful, functional prints!