Double Jacketed Gaskets are used on boiler and heat exchanger applications when ample bolting is available to correctly seat the gasket. They are designed for high pressure and temperature applications up to and inclusive of Class 900. The temperature limitation of the gasket is dictated by the combination of metallic and non-metallic materials used in its construction.
          The standard Double Jacketed Gasket has good compressibility and resilience and is the most popular clad gasket manufactured. For Double Jacketed Corrugated, this style employs a corrugated jacket to increase resilience and suited for circular and non-circular application in widths of 3/8" and wider, it is an improvement over the standard Double Jacketed Gasket. If slight leakage should occur across the primary seal at the inner edge of the gasket, the concentric corrugations act as labyrinth seals"