Kammprofile gaskets are recognized as a problem solver for Shell & Tube heat exchangers, large vessels, and equipment that experience excessive movement due to thermal expansion. Kammprofile gaskets consist of a sealing core metal with or without guide ring. The sealing core is a solid metal gasket with concentric serrations on both sealing surfaces and faced with soft material such as flexible graphite, EPTFE configuration depending on operating conditions. It is the preferred design when needing improved performance at low seating stresses.