Description of the Product offers a variety of static seals. In a static sealing application there is no movement between sealing surfaces or between the seal surface and its mating surface. The most common seal used in static sealing situations is the O-Ring. But there is a variety of static seals, such as Back Up Rings or Bonded Seals in different materials. Back Up Rings for example, have no intended sealing function and are used as protective and supporting elements, most often with O-Rings. These products are made of extrusion-resistant material and are installed in a groove together with an elastomer sealing element, which is most often an O-Ring.