Wisesorb 40 Gram Pack of 3 Silica Gel Canister, Gun Safe Dehumidifiers (Orange to Green), Reusable Desiccant Moisture Absorber for Car, Closet

Fantastic!! These things really work. I used the microwave technique to “dry” them out. Put the used desiccant’s on a folded dry kitchen towel in the microwave. Nuke for 2 mins. Transfer dessicant to another dry towel and repeat, however nuke for only 30 mins at a time, as you don’t want the plastic window to melt. Was able to bring the humidity down to 30% in my 3d printer enclosure, basement was at 60%. It’ll keep the humidity level down for a few days, which is enough for the amount of printing I do (I’m not running a farm, just printing for kids etc).

They work exactly as described. Color changes from orange to green. They're reusable but one downside is the time needed to dry the silica gel: 3 hours in an oven at 250 F. I use 1 in my car and 1 in my camera bag. Instead of an oven I use an air fryer. Air fry for 15 minutes at 250 F and leave them inside the fryer for about 10-15 minutes with the air fryer turned off (while it's still hot inside). Repeat that 1x to 2x if necessary. So that's a maximum 45 minutes air frying with 10-15 minutes breaks in between. They become dark orange when completed, ready to reuse.

Work great in my gun safe and money

When it comes to my firearms and ammunition storage, I'm a little bit of a fanatic when it comes to quality. I received these and use them in all of my firearm and ammunition hard cases. I've also used them in file folder plastic containers where I store paperwork for my conceal carry classes I teach. I've ordered these multiple times. I've never had to recharge on (and hope I'll never have to). Because I haven't hard to recharge, or seen any water damage in any of the cases, I can't attest to their longevity. That's the ONLY reason I'm giving this four stars instead of five. I don't like when people post a five star review for a product they haven't yet used it its entirety. Those aren’t helpful in my opinion. With that said, I have a sense of comfort that these will protect everything within the cases in which I put them, which is why I've purchased these multiple times.

These Wisesorb silica gel canisters work exactly as advertised. I use them in my gun safe and tool cabinets, and they effectively absorb moisture without any mess. The color change from orange to green makes it easy to know when it’s time to recharge. I appreciate that they’re reusable—just pop them in the oven and they’re ready to go again. Great value for long-term moisture protection. Q&A Section: Q: How do you know when they need to be recharged? A: The beads turn from orange to green to signal it's time to recharge. Q: Can these be reused? A: Yes, they are fully reusable—just bake them at low heat to dry out the moisture. Q: Are they safe to use in gun safes and closets? A: Absolutely—odorless, leak-free, and compact enough for tight spaces. Q: How long do they last before needing recharge? A: It depends on humidity, but generally they last 2–4 weeks before needing to be recharged.

These are great and highly recommend

These work very well and are easy to dry in the microwave

I bought the Wisesorb 40 Gram Silica Gel Canisters to use in my Kobra S1 ACE Pro filament dryer, and they’ve worked perfectly. They keep the humidity under 39% most of the time, which makes a huge difference in print quality. What I love: Reusable: Just dry them out and they’re good to go again. Practical for 3D printing: You can even 3D print a holder to attach them to the roof of the ACE Pro, which makes them super convenient. Great value: A pack of five lasts a long time and gives plenty of coverage. These are awesome little canisters and do exactly what they’re supposed to. If you’re looking for a simple way to manage humidity in a filament dryer, I highly recommend them!

Zero issues. Product works great.

I’ve actually found this really annoying at this stage considering I have to stick them in an oven using a lot of electricity just to dry them out after saturation. Clearly the container they’re in is not airtight but they’re being said it’s probably cheaper to buy the disposable packs and ruined the environment at the same time. Honestly, I should just get a better container and keep them in a better area.

These are awsome. Keep your valuables dry and safe. Also reusable!

These are working as described and are very useful - especially the way you can put them in the oven to refresh them.

As described, recharges and works well