Vespel® SP-1 virgin polyimide is an unfilled base resin. It scores better than all other Vespel® grades on strength, elongation, purity and electric and thermal insulation. It can operate in temperatures between cryogenic and 300 °C. Thanks to its resistance to stress relaxation, Vespel® SP-1 will prove to be a highly reliable seal, even outperforming metal-to-metal seals with much narrower tolerances.
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