I've had to move my grain to the garage. It's in Rubbermaid containers. It's been floodin down in Texas and I fell like the humidity is affecting it. Does anyone here use food grade desiccant in their grain bins and does it work?

Why food grade desiccant? I'm not recommending anything, just asking. If the desiccant doesn't come in contact with the grain why would it have to be food grade? Does the desiccant outgas as it absorbs moisture?

I use activated alumina in my gun safe. I just filled up a couple old hunting socks and threw it in the bottom of the cabinet, works great in a damp Wisconsin basement. I pull the socks out every couple months and regenerate the desiccant by microwaving them for a few minutes. I'm planning to do the same with my grain that I keep in a Rubbermaid container. The grain is double-bagged in one gallon Ziploc?s and I don't see any reason to worry about desiccant dust getting in there. If you're going to use silica gel (the kind found in shoe boxes) just make sure it's never exposed to liquid water. Silica gel will craze and crack when wet, and that's no good.

Where do you buy activated alumina?

You can also get silica gell at hobby shops to dry flowers with.

Brewboy:
AA desiccant is sold through air compressor suppliers for regenerative compressed air dryers.

Sorry to revive this thread, but am I the only one to use about a pound of calcium chloride, separated from the grain but in the same airtight container, as a drying agent? Not very expensive, very effective, and it?s also great for the treatment of mash water. Or is there a reason not to do so?

Interesting idea. I'd assume pretty much any anhydrous powder would work similar. If you used the CaCl you'd have to factor in the water absorbtion effecting the weight when measuring. However a silica or similar dessicant will have much more capacity to pull moisture out of the air. I'll have to try this some time with my leftovers bins.