During the processing of plastics, the presence of moisture can cause a problem. Desiccant masterbatches can help counter this problem by preventing the adsorption of moisture during transportation. Moisture can be present in raw materials such as polymers, fillers, and pigments. Additionally, reprocessed polymer may contain high levels of moisture. When processing a polymer with high moisture content, the polymer can become porous, which can lead to voids or lower tensile strength in the final product or extruded/blown sheet.