Quoted:You don't understand how silica gel works do you?
It doesn't keep pulling moisture out of the air. It isn't some magic gel that keeps sucking humid air into the can forever. Once it is saturated with water, the relative humidity in the can either is decreased if the can is airtight or will be the same as the air in the garage, closet or wherever.
I probably understand it better than your reading comprehension of my post.
1, It's not a "porous sand"
2. My comment was saying that it will do nothing with a open container just as your
googled pdf covered, it will become saturated as the air in the non sealed environment will maintain the relative humidity w/ the outside. I.e. "
Keep pulling moisture out of the air and it will keep building since its not airtight." If you really want to nitpic than yes I could have said "keep building until 100% saturation"
Would you want a saturated substance in with your ammo? Say the plastic tub gets something put on top of it (becomes sealed) when it is saturated and the temps then increase, oh there is some hygroscopic cardboard in their as well (becuase that's what most ammo is shipped in), guess what, now the desiccant can release the water to the environment to the other hygroscopic materials, it mentioned that in your pdf.
Now depending on the desiccant mentioned (bulk in coffee cans) there could be a real problem. I.e. if its silica gel, well then maybe okay. If its some other stuff like "dri-rid" or the like, it will actually pull water so well that it will accumulate moisture-big problem.
So I think I understand it really well, especially in the context of the OPs post and your googled document.