What type of gasket material is commonly used for high-temperature applications?

In high-temperature applications, graphite is commonly chosen as a gasket material due to its excellent thermal stability and ability to withstand extreme temperatures, often exceeding 500°F (260°C). Graphite gaskets can maintain their integrity and provide a reliable seal even under intense thermal stress. This material also offers good chemical resistance, making it suitable for various industrial applications involving heat and corrosive substances.

Rubber and neoprene gaskets, while useful in many standard applications, typically do not perform well at elevated temperatures, as they can degrade and lose their sealing effectiveness. Fiberglass, while it possesses good temperature resistance, is not used extensively as gasket material on its own. Instead, it is more often combined with other materials to enhance thermal insulation or structural integrity, rather than serving as a primary sealing component.