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NOVATEC 925F's high percentage of graphite and low percentage of rubber binder gives it such remarkable media and temperature resistance. NOVATEC 925F is Frenzelit's universal high pressure compressed sheet gasket material and it contains 75% pure graphite. This is an excellent chemical sheet that works best in flanges, pump casings, heat exchangers, lids, vessels, valve bodies and sight glasses. It can replace flexible graphite in many applications.