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  1. Expired: Armstrong MetalWorks DESIGNFlex/Armstrong World Industries/2018-05-29
    Cover of Armstrong MetalWorks DESIGNFlex — open the PDF

    Open the PDF · HPD 6056

    HPD has expired. Expiration Date: 2021-05-29

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  2. Expired: Armstrong Ceilings Calla/Armstrong World Industries/2019-12-19
    Cover of Armstrong Ceilings Calla — open the PDF

    Open the PDF · HPD 9726

    HPD has expired. Expiration Date: 2022-09-20

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    The smoothest finish mineral fiber ceiling available with Total Acoustics™ performance – excellent noise reduction and sound blocking in one product.

  3. Lyra PB High CAC Ceiling Panels/Armstrong World Industries/2025-09-23

    Open the PDF · HPD 50875

    Expiration Date: 2028-09-19

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    Lyra™ High CAC ceilings provide Total Acoustics™ performance (noise reduction and sound blocking) in one ceiling panel to meet the demand of today's flexible spaces. These high light reflective, impact, scratch and soil resistance panels…

  4. Expired: Armstrong Ceilings Calla/Armstrong World Industries/2021-12-13

    Open the PDF · HPD 50320

    HPD has expired. Expiration Date: 2023-09-16

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    The smoothest finish mineral fiber ceiling available with Total Acoustics™ performance – excellent noise reduction and sound blocking in one product.