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Sandwich Panel Rock Wool Corrugated for Factory Wall Roof. Corrugated Profile for Extra Rigidity & Large Panels The ribbed metal face adds structural strength, allowing larger panel sizes with fewer vertical joints for a cleaner facade and faster, more cost. A-Class Fire Resistance & Thermal Insulation Non-combustible rock wool core meets strict fire codes while delivering year-round energy savings and acoustic comfort. CE & ISO Certified with CNAS Lab Testing Fire and mechanical performance verified by our CNAS-accredited laboratory; full OEM support from two fabrication bases.