100 kg / m³ density Rockwool which specially manufactured for wall panel used as a fitting material between 8-10mm thickness of Dragonboard. Special procedures is formed by the bonding of Rockwool fibers in the inner layers vertically.
Both Rockwool and dragonboard has fire resistance class A1 .
Dragonboard is a material origin of Magnesium. 1000c resistance to the three-hour show is guaranteed by the manufacturer. With this feature, supply of metal to a higher fire resistance.