The magnesium oxysulfate cleanroom panels market is shifting from a low-cost alternative to rock wool toward a specification-grade A1 core material for humidity-controlled GMP, hospital OR, food processing and fire-compartment enclosures. Three forces drive this change: tightening building fire codes demanding A1 non-combustible cores, pharmaceutical and food cleanroom standards requiring low-halogen, moisture-stable walls, and supply-chain consolidation around Foshan-area source manufacturers with controlled MgO-MgSO₄ formulation, four-side sealing and batch-level certification. This module gives procurement engineers, cleanroom GCs, fire-protection subcontractors and export EPCs a 2026–2030 market outlook plus a vendor selection matrix anchored to SAMZOON's Foshan source advantages: free samples, custom cores, expedited reschedule and on-site node review for South China purification projects.