"Dry & Dry" [15 LBS] Premium Orange Indicating Silica Gel Desiccant Beads(Industry Standard 3-5 mm) - Rechargeable Silica Beads(2 Gallon)

I had some other color changing silica beads and they weren't really bringing the humidity down much... I put these in with some filament in a dryer box (which was turned off) and the beads alone brought the humidity level down to 0% within 48 hours!

These are my go to for controlling humidity for my 3D print filaments.

This works well and it a great value.

This is great! I've used two jugs between the additional desiccant containers I printed to fill all the empty space in the Bambu Labs AMS and in the bottom of the filament storage dry box I made with a silicone sealed plastic storage bin from Target and a couple wire drying racks.

All the folks using these in closets and non-sealed containers are wasting their time. They are slow to absorb moisture and if there's any airflow at all, even a pinhole, that makes them useless. They work really well the first time but i have tried many times to get them to fully re-charge without success in a humid environment. New, the humidity in a sealed container is about 5-10% (very good). After they turn from orange to red, the lowest relative humidity is about 20% (not so great for long term storage). Recharging in the south (Texas gulf coast) never goes back to orange, just red. A note on "sealed containers" a surplus ammo can works great. Most of the plastic storage boxes, even with seals are not adequate for long-term storage in humid locations.

It's color indicating silica. It keeps my stuff dry and I can easily see when it needs recharged. I found that if I spread the beads across a couple of cookie sheets it recharges much quicker than if it's stacked deep in a pan. The price is very competitive especially as you move to larger quantities if you have the need for bulk amounts. Leaving the review after using this for a couple of years because I decided to get some more!

Relative humidity in my dry box went way down a couple days after adding these beads. Beads outside the box turned green after a few days. Ones inside stayed orange. Seems to work!

Works well for keeping my printer filament dry. It is keeping the semi-sealed tub I keep the spools in measurably drier than the ambient air, and would work even better if I could get a proper seal on the lid. As a control test I left a small amount of the silica open in my basement and it turned dark green overnight. The cheap hygrometer I have indicated about 65-70% relative humidity down there so I know the desiccant does indicate very clearly when spent. Reactivates easily in the microwave too. Keep in mind that the orange/green desiccant is the same silica gel as the blue/pink. The blue/pink type contains cobalt which is a known toxin if that is a concern you have.