... 4 Heat and fire insulat Product DescriptionRock wool sandwich panel uses vertical-hair-shaped rock wool as inner side, colored steel sheets as ... ; 4, waterproof; 5, load-bearing capacity. Introduction: Rockwool sandwiched panel is composed of 2 layers of waterproof colored steel and ... gymnasiums, freezing stores, purification workplace, etc. Fireproof heat insulation rock wool sandwich panel