Epoxy Resins and Polyurethane in PCB laminate, Prepreg and RCCs are used for protection in thickness. These systems generally two liquid components when mixed climb quickly in viscosity until fully cured. They are designed to protect and insulate the printed circuit board components against harsh environments : moisture, vibration, mechanical and thermal shocks. The resins offer a total protection of the printed circuit and allow through the deposited thickness of the subset to work completely immersed in water, solvent, gas …

There are a variety epoxy resins in PCB materials for PCB manufacturing: