Below is a list of Bonded Seals manufacturers from East Longmeadow, Massachusetts. Bonded seals are composed of a round or square metallic washer that is adhered to a seal similar to an o-ring; they are found in both hydraulic and pneumatic connections that are exposed to extreme pressure. They are bonded together inside the diameter to provide low to high-pressure sealing, but they are used mostly in high-pressure applications.