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Sandwich panel is a building product consisting of two metal faces positioned on either side of a core that is a thermally insulating material, which is firmly bonded to both faces so that the three components act compositely when under load. One or both metal faces may be flat, lightly profiled or fully profiled. Metal faces are protected against corrosion by galvanization with zinc layer and paint. The core material is consisting of mineral wool lamellas. Wall panels with mineral wool (MW) insulation core are designated for applications with high fire resistance requirements (fire walls, fire compartments, partitions, etc.). MW wall panels may also be used for projects with higher sound insulation requirements.