System Overview A Silica Rock Cleanroom Panel bonds two coated-steel facings to a rigid, inorganic silica rock (silicon crystal) core — an A-grade fireproof, moisture-proof and high-strength cleanroom wall and ceiling panel made to a ≤ 2 mm/2 m flatness tolerance. Key advantages: A-Grade Fireproof: Non-combustible mineral core, no droplets or heavy smoke under fire. Moisture-Proof: Water absorption ≤ 5% — does not swell, far better than ordinary rock wool in damp areas. Rigid & Strong: Hard, high-density board with strong impact and compressive resistance.