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

Excellent. i bought these to bring the humidy down in my guitar case. The products specifically made for that task did not work. I used only one and it brought the humidity down from 67% to 49% in less than a day. Now I have the product made for it in there to see if it will keep it at that level. This product works great.

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).

These are great and highly recommend

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.

Works as described. I have some that microwave and that’s easier but- I like the metal /form factor and size etc.

All come in individually sealed bags with reactivation instructions each to prevent moisture and cross absorption of moisture. Perfect if you need less than 5 and want to keep the rest stored. Metal case feels sturdy and window is easy to see color.

Unnecessary plastic inside of plastic inside of plastic when I received these. Ridiculous. Aside from that, I can't tell how much they work because mine turn light green within a few days to a week to start with. And the set I've had the longest, when I used the microwave as instructed, they still didn't revert back to orange.

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

These products are great for having an extra layer of corrosion protection for your paperweights ;) ;) They help reduce humidity level in safes, lockboxes, etc. After the silica gel thingies are full you just pop them in the oven at 250 F. I left them in for 6 hours once BY ACCIDENT and they were perfectly fine. BEFORE heating in oven, ENSURE that the containers are FULLY closed to prevent any of those little tiny beads from pouring out onto your entire kitchen and potentially killing your cats 🫠

As described, recharges and works well