Wisesorb 7.5 LBS Activated Alumina, Alumina Desiccant Great for Filament Drying, Reusable Dessicant Dehumidifiers Desiccant Moisture Absorber Prevent Wet Filament

Unbelievable! Truly works and works well. Reason For Purchase: I have been 3d printing for nearly a year. I recently read that the traditional orange to green or black desiccant puts off harmful chemical VOCs and want to look into a safer alternative. Experience using the new Weisorb 10x with activated alumina: AMAZING!!! I have not had any issue with the traditional orange desiccant at all, and have effectively been able to keep my filament at well under 10% humidity but I did notice it was losing it efficiency faster and faster. Early this week I switched over half of my filament over to the Weisorb and left the other half still using the orange stuff. The Weisorb desiccant got to under 10% humidity much quicker and to my surprise I think I’m at a near 0% humidity. The AMS 2 Pro is showing 0% humidity and just holds like a champ. I can’t even smell the new desiccant at all. Honestly, if u are looking for good desiccant that’s safer and keeps humidity levels extremely low, I would suggest buying and using this stuff. It’s a bit more but not by much and if this stuff lasts even longer, while using less material it ends up being way cheaper and works wayyyyyy better

This stuff works awesome...better than silica. Its abit more expensive but worth it it aborbs a lot of moisture from my 3D filament and it recharges very easily. It darkens as it absorbs moisture and is obvious when its time to recharge

It's more expensive and has no color indication so I was skeptical when I got this but figured I'd indulge my bougie impulses and they were well rewarded. I got these for my 3d printer filament dry boxes and it's night and day. I live in the EXTREMELY humid S. Eastern US where the LOW, indoor relative humidity is in the 60% range. Filament starts stringing like crazy after a few hours in the open. To test efficacy I used the exact same desiccant holders and swapped out the silica for activated alumina. My K2 Plus CFS used to bottom out at 15% RH with 3 separate added desiccant holders plus 4 in spool ones. My dry boxes were 20% Just using 2 of them but filled with this stuff took me down to 5% and whenever I swap spools, it gets back down to 5 much quicker. My dry boxes go lower than the minimum 10% my cheapy hygrometers can read. If you're concerned about color indication, don't mix the silica but instead they also sell RH test strips you can use. However what I've found by switching to this is the color does matter. Add desiccant until you reach the desired RH. Whenever that begins to rise it's time to replace/recharge it. The part we care about is the humidity and for filament or electronics, the color indicator shouldn't be what tells you that it's too high. It's also easier to 'recharge' as the color used for indication is toxic while activated alumina is pretty much harmless. While it's more expensive, you get a much better value for the money which does a better job and lasts longer. The filament boxes show petg. I had honestly just thought my hygrometers bottomed out at 20% until testing the alumina. Plus this Wisesorbent is cheaper than the other options.

Gets 4 stars for the price but 5 stars for how well it works. Plus, thee is no color dye changing letting you know that it needs heated to recharge. This stuff works a lot better that the silica beads...by far. I did mix some color changing silica ones so I can have a better idea of when to hat these to recharge them. I do 3d printing. I put about 2 handfuls in each filament container and it lats for a long time. Highly recommend.

So much better than silica beads. Keeps things insanely dry. Will buy again

This stuff is insane. I live in a very humid tropical zone with 75% RH and the AMS 2 Pro was constantly measuring around 25-35% with weekly 12 hours filament drying sessions at 60° degree C (silica only halfway dried) Immediately after replacing the silica with the alumina, the humidity started to go down. After a couple hours the AMS reports 10% and the same on the meter. Never seen such numbers before with the silica, I’m beyond impressive how well this stuff works. I still need to check after 15 days or so if they are still efficient. This is how long I would need to replace the silica with fresh ones before drying them. Supposedly the alumina can absorb more % of their weight. Cons: -When poured out of the container there is a small dust that can be picked up by air drafts, not sure how safe is this to be around with. -The beads seem to be quite fragile, not sure how well they can handle continuous handling and re-drying on the oven. -Expensive but not by that much

I have been using silica gel desiccant for years and decided to give the Wiseorb Activated Alumina a try and I have been very impressed. I used this to keep my 3D printing filament dry. I swapped out the silica gel and the difference is incredible. The silica gel would never really get below 10% and would quickly go back up to 15%-20%. I am able to get the activated alumina down to 3%-4% and it stays below 10% for weeks even with frequent filament spool changes. The attached picture is after a couple of weeks, and it is still well below 10%. On top of that I will probably never need to change it out, I just run the AMS drying function every few weeks and it goes back down to 4%-5%, I have even been able to get it to stay below 3%. Best of all I have not experienced any of the common issues with moisture in my filament since I switched. After several months I am very impressed and would highly recommend this.

This stuff works SO much better than silica dessicant… why the other stuff is advertised as the stuff to use is beyond me… this works fast & strongly pulls out moisture.. and can be recharged!! I found little sugar shakers to put it in…use, put in the oven .. recap and reuse!!

Purchased to use in Bambu lab ams. It’s nice and even in size. Not dusty and took the humidity from 60 to >10 within a few hours. Lasts a couple of weeks before the humidity starts to increase. I’ve simply replaced with fresh stuff and doing that I think I would get at least 6 months worth but I do plan to reactivate the used stuff in future so it should last for years.

und das innerhalb von wenigen Stunden - unglaublich. Ja verhältnismäßig teuer aber auch im gleichen Maße wirkungsvoll. Habe meine PET Filamente jetzt alle in Boxen mit Hygrometer, jedes einzelne wo vorher Silikagel verwendet wurde, hatte trotzdem 23% bis 32% Feuchtigkeit, 6 Stunden später mit Aluminiumoxid 10%. Super zu dosieren via praktischem Griff. Absolute Kaufempfehlung meinerseits.

What an absolutely superb desiccant! I'm using it in my Bambu Lab AMS and spool holders. Literally within 5-7 minutes the humidity dropped to 20% and within approximately 1 hour, it was down to 10% and stayed there. Also the hygrometers in my spoolholders all show 10% and staying steady (in a vacuum bag). This now is officially my desiccant of choice. Yes... it is quite expensive, but TOTALLY worth it for me.

Happy I switched from the silica beads. I like that these are larger balls perfect for my 3d printed dessicant holders where silica inconsistent size would allow them to leak

Works great and easy to poor into storage containers