Sealed clamp top 55 gallon drum with dessicant packs.
"You must be the change you want to see in the world." "First they ignore you, then they laugh at you, then they fight you, then you win." --Mahatma Gandhi
"Preach the Gospel always, and if necessary, use words." --Francis of Assisi.
"Family farms work when the whole family works the farm." -- Adam Klaus
Something deliberate/extreme as R Scott suggests, or 5 gallon pails with good lids? Maybe in a contractor bag taped completely shut? or at the very least, in a dry, heated room.
Never had much luck in a garage, beyond keeping the rain off the sacks for a week or two.
And here's the wise-ass answer: Store it at the store. (buy what you need, return the excess)
They have the same problem, being hydroscopic.
They will always sniff in moisture and harden.
In my experience its best to buy these products as you need them. when ever I have bought 2 more and left them for some time, bang they have hardened.
Any bulk deals are not worth it.
We have them packed in 'recyclable plastic now, I left 2 on the ground next to a job I am doing.
We have had 2 inches of rain and the bags leaked a little. I could still use the great proportion of the bags, but I was surprised.
The old paper with a plastic liner would have been fully useless!
I have had good luck storing portland cement in a steel drum with the lid on. The bags have a plastic lining, which pre-mix does not. I have found an unlimited source of sand on my property, so buying in the cement and some course aggregate ends up being a better deal anyway. I am not sure if I have had a sack sit in there for a full year, but 6 months is no problem at all. Since the sacks are so heavy, I open them up and scoop them out when I need some, and the bottom of the drum is now covered in loose cement - perhaps that helps keep the humidity down in there?
Do not meddle in the affairs of dragons - for you are crunchy and good with ketchup. Crunchy tiny ad:
It's like being on a deserted island - only with gardens and natural buildings in Montana