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The Reason for Choosing Vermiculite as SWG Gasket Filler


In 1987, Flexitallic experimented with a mica-encapsulated graphite seal to resist extreme temperature, and pressure conditions. Although unsuccessful, our search led to discovery of vermiculite's use in sealing— the basis for the incredibly versatile material, Thermiculite®. Unlike mica, vermiculite can be exfoliated. But unlike graphite, it will not oxidize—enabling Thermiculite to create a lasting, gas-tight seal in high-temperature (up to 1800°F/982°C) and high-pressure environments. Something mica, graphite or mica still can not do.