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HPD Public Repository

Withdrawn HPDs

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  1. Viper II 10mil Class A/ISI Building Products/2024-09-17

    Open the PDF · HPD 38866

    Expiration Date: 2027-09-17

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    Viper II 10-mil is a multi-layered (co-extruded), under-slab vapor barrier engineered to meet and exceed all ASTM E1745 Class A performance requirements. The virgin resin used to manufacture Viper II contributes to its long-term stability…

  2. Viper II 15mil Class A/ISI Building Products/2024-09-17

    Open the PDF · HPD 38843

    Expiration Date: 2027-09-13

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    Viper II 15-mil is a multi-layered (co-extruded), under-slab vapor barrier engineered to meet and exceed all ASTM E1745 Class A performance requirements. The virgin resin used to manufacture Viper II contributes to its long-term stability…