Additives are generally used as a primary contribution to the existence of the end product, or they act as auxiliary or secondary functions. The range of additive substances used in the adhesives and sealants industry includes plasticizers, thickeners, fillers, curatives and emulsifiers. To optimize their influence in the formulation, additives must be homogeneously mixed or dispersed throughout the system. For powdered additives often used in large loading levels (such as calcium carbonate, silica, talc and mica), optimum dispersibility is even more important because of inherent particle agglomeration during the manufacturing process. To deal with these issues in light and heavy body formulations, e.g., low to high viscosity systems, these materials require medium- to high-shear energy dispersion equipment. The proper choice of equipment is dependent on the unfilled formulation viscosity and the required shear needed to achieve optimum homogeneity of the additive(s) in enabling its maximum effectiveness.