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1. PermaBASE Cement Board/PermaBASE Building Products, LLC provided by National Gypsum Company/2026-04-10

   Open the PDF · HPD 44492

   Expiration Date: 2029-04-10

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   PermaBASE® Cement Board provides a durable surface designed to withstand prolonged exposure to moisture. Made with Portland cement, aggregate, and fiberglass mesh, it works well as an underlayment for tub and shower surrounds, countertops…