Bonded Seals are used where the seals are required to move in and out of the seal bore under pressure. The bonded seal is designed to replace copper type washers in high-pressure systems. These bonded seal comprises a metal washer and an elastomeric ring bonded inside the diameter. Bonded seals are available in self-centralising form, which eliminates seal offset and makes for easier installation. Bonded seals consist of an outer metal ring with a nitrile or EPDM component bonded to the inner face. Bonded seals are metal washers with a rubber insert bonded to the inside diameter for use in high-pressure applications. The bonded seals are constructed with a metal ring that prevents excessive rubber compression and limits the deformation of the elastomeric element.