... , as well as toxic free, GM Fireproof decorative board is one of the products of GM series. It ... 5018QualifiedSustained combustion time, S≤200QualifiedQuality loss coefficient, %≤5041.9QualifiedTesting authority: National fireproof building material quality inspection supervision center Usage: ... . Can be made into closet, furniture, partition board, insulation board, building templates, ceiling ...