Circuit Breaker Desiccants bags are designed to be suspended in the breaker housings to adsorb water vapor and other arc products. A desiccant is a hygroscopic substance that absorbs or adsorbs water. It is most commonly used to remove humidity that would normally degrade or even destroy products sensitive to moisture. Circuit breaker desiccants have become a mandatory maintenance item for most breakers in use today. The molecular sieve is a synthetically reconstituted alumina silicate which is generated and processed under stringent conditions to establish exact pore dimensions within the lattice of the molecules crystalline structure. These pores are created by removing the water of crystallization from the compound. In its dehydrated state, the molecular sieve exhibits a tremendous affinity for water and smaller hydrocarbons, adsorbing over twenty percent of its weight of such contaminates. The incorporation of molecular sieve into the static drying system essentially eliminates the danger of arcing caused by gas contamination in the breaker housing. Circuit breaker desiccant are packed in heat-sealed, vapor-proof foil enclosures to prevent contamination of the product prior to use.