Clay, the least expensive of all desiccants, and is used in most industrial applications requiring humidity control. Silica Gel has a porous molecular structure that closely resembles a sponge, and has the highest capacity of any commercial desiccant for moisture adsorption. Molecular sieve is derived from sodium potassium or calcium alumina silicate. It is a non-hazardous material. Molecular sieve is the desiccant of choice for the most demanding and unique applications.
Molecular sieve is the most aggressive and expensive of the primary desiccants.
Silica gel and Clay are also available in bulk bags, as well as custom blends of two or more desiccants. HIC Cards are cards designed to measure the humidity level within a packaged environment. Humidity indicating cards are generally placed inside the container to show the humidity level and indicate when the desiccant needs to be replaced.