Ready Hour Iodized Salt is the perfect emergency item to have on hand. Salt preserves food, and aids in the flavor of some foods. Ready Hour Products require no refrigeration. This is vital when the grid is down. Our #10 cans are made of steel, waterproof and resistant to tough elements, and stores easily on a shelf or in a closet. Store it in a cool, dry location where temperatures stay between 55 and 75 degrees for optimal longevity. 30-year shelf life unopened Product weight is 6.5 pounds.