Montmorillonite Clay is the least expensive of all desiccants and is a naturally occurring non-hazardous mineral composed of magnesium aluminum silicate (a calcium aluminum silicate type of hydros clay).
Montmorillonite Clay is used in most industrial applications requiring humidity control because it recharges easily and does not swell as it adsorbs water vapor. Subject to a degree of variability for being a natural material, clay desiccant will adsorb approximately 25% of its weight in water vapor at 77º F and 40% relative humidity.
