Bonded seals, also known as Dowty seals, are a type of sealing washer that are designed to provide a reliable seal in high-pressure applications. They are commonly used in hydraulic systems, fuel systems, and air conditioning systems.Bonded seals consist of a metal washer with a rubber seal bonded to one side. The rubber seal is typically made of nitrile or silicone rubber, which provides excellent resistance to oils, fuels, and chemicals. The metal washer is typically made of steel or stainless steel, which provides high strength and durability.The sealing function of bonded seals is achieved through the compression of the rubber seal against the mating surface. The compression of the rubber creates a seal that prevents the escape of fluids or gases from the system.Bonded seals are preferred in high-pressure applications due to their ability to withstand high levels of compression and maintain a tight seal. They are also designed to prevent the loosening of bolts and nuts..www.bdseals.com/Bonded-Seal