Calcium Oxide

Our StayDry-C™ Calcium Oxide desiccant packets are designed to adsorb a much greater amount of water vapor at a very low relative humidity than other materials. Sometimes known as "quicklime", these small packets are most effective where a low critical relative humidity is necessary, and were there is a high concentration of water vapor present.

Calcium oxide is a stable and highly effective solution for projects with troublesome environmental concerns. It removes water from a package very slowly, often taking days to reach its maximum capacity. As calcium oxide adsorbs moisture, it swells. Proper desiccant packaging is required for effective use. For these reasons, it is primarily used in the packaging of dehydrated foods.