Wilden's AODD (Air-Operated Double-Diaphragm) pumps utilize rubber diaphragms, specifically engineered to provide a wide range of temperature resistance, long flex life, and increased chemical resistance, according to Wilden Pumps. These diaphragms are made from various rubber compounds, often incorporating natural rubber and synthetic additives to enhance resistance to specific fluids. Wilden also offers Ultra-FlexTM designs and traditional AODD diaphragm shapes.