Filament Drying Desiccant (2 lb) by Slice Engineering | 10X More Powerful Than Silica Gel | Infinitely Rechargeable | Prevent Wet Filament | Fits Perfectly Inside Spools | Made in The USA

These work a lot better than the silica gel beads. I was able to keep a consistent 10% humidity or lower with these.And recharging them is fairly easy. I'd recommend these to anyone thinking about them. For using on three d printing or anything else

There is a special place in the 3D printing world for those who can deliver on a promise, and this product does it in spades. I'm talking about the kind of relief you feel when you go from fighting the stringy mess of wet filament to printing with bone-dry, perfect material.I've tried a lot of solutions, from Silica to standard-issue desiccant, and I can tell you they aren't even in the same league. My AMS humidity was a concerning 33%, like, always. I popped this stuff in, and in less than 24 hours, it had dropped to an incredible 9%. Even more impressively, it has held that low humidity level for a solid month now. If you're serious about your 3D printing and tired of dealing with moisture-related print failures, this is an absolute game-changer. My one regret? Not buying the bigger size to begin with.Do yourself a favor and get the larger pack—you won't regret it.

Using it in an airtight box to keep my 3D printing filament dry. It seems to do the job at keeping the humidity of the box stable, ~15-20% lower RH than ambient.I have not tried recharging any of it yet, but seems straightforward to do in an oven.

Filled the holders in my Bambu AMS and humidity dropped to 2% in just over a day. This stuff is way more effective than the silica beads. No visual indication though (like the colored beads) so assuming i'll have to keep an eye on humidity level and refresh as needed.

This will keep the filaments dry, but it's not a dryer. The automatic feature is nice and it fits 4 *normal* spools just fine, plus some dessicant. I keep my commonly used PETG in it. It feels a bit on the "inexpensive" side, so no 5 stars.

THIS stuff is the GOAT. I live in Missouri, which we lovingly call the Devil's armpit because keeping filament dry here is not a task, you have to make a commitment to it like none other. However, with activated alumina, we finally can take it easy! First, it's excellent whenever you need to quickly attack that one spool you accidentally left out for a few days - Simply vacuum bag it with a small container of this in it and in 12-24 hours, it will be good to go (the same approach works well for long-term maintenance). The ability of alumina to extract humidity is very powerful, so a small amount goes a long way. Additionally, for the amount you'll use per application, the price is extremely reasonable, and being that the alumina can be easily recharged in your oven safely, it's well worth the investment!

These are much better than traditional silica beads. Only drawback is due to their chemistry they do not show when it’s time to dry them and recharge them. Use a humidity sensor to monitor saturation levels.

The bottle I received weighed more than 10% less than the 2 lbs it was supposed to have. The cap also screwed off without removing the seal. This matches what a few other reviewers stated, so you can expect the same. The good thing about this stuff is that it actually works really well. It's just incredibly annoying they short people what they are paying for.