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Withdrawn HPDs

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  1. StarSilent Fix/Pyrok, Inc./2025-10-21

    Open the PDF · HPD 42120

    Expiration Date: 2028-10-21

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    Pyrok's StarSilent Fix Adhesive is used to bind together the edges of the StarSilent Panels during installation of StarSilent Acoustical Systems. The result is a smooth, seamless, sound absorbing, durable plaster finish system for walls…

  2. Acoustement 40/Pyrok, Inc./2025-10-10

    Open the PDF · HPD 42042

    Expiration Date: 2028-10-10

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    Pyrok Acoustement 40 is a nominal 41 PCF (air-dried density) Portland cement/exfoliated vermiculite spray-applied formulation, which is 100% free from asbestos, mineral fibers, and polystyrene. Pyrok Acoustement 40 is highly abuse…

  3. Acoustement Plaster 40/Pyrok, Inc./2025-10-10

    Open the PDF · HPD 42041

    Expiration Date: 2028-10-10

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    Pyrok Acoustement Plaster 40 is a 40 PCF (air-dried density) gypsum plaster/exfoliated vermiculite spray-applied formulation that is 100% free from asbestos, mineral fibers, polystyrene and cellulose. This product is highly abuse resistant…