System Overview A Magnesium Oxide Rock Wool Cleanroom Panel bonds two A1 magnesium oxide (MgO) facings to a high-density rock wool core — an all-inorganic, fireproof and moisture-proof cleanroom wall and ceiling panel built to a ≤ 2 mm/2 m flatness tolerance. Key advantages: A1 Non-Combustible: Double MgO facing plus A-grade core — passes strict fire-code audits. Moisture & Mold Proof: Inorganic build with no rust, no off-gassing and zero swelling in wash-down rooms. Walkable & Flat: Anti-sag rigid skeleton for seamless wall and ceiling runs.