Desiccant masterbatches are additives used in the production of monolayer films to control moisture levels and improve the quality and performance of the films. These masterbatches typically contain desiccant materials, which are substances capable of absorbing and adsorbing moisture (water vapor).

Moisture can make films more brittle, especially at low temperatures. Desiccant masterbatches can improve the flexibility and impact resistance of monolayer films in cold and damp environments.