... Easy installation 4 Heat and fire insulation Product DescriptionRock wool sandwich panel uses vertical-hair-shaped rock wool as inner side, ... : 1, good fire risistance; 2, good temp-keeping and heat insulation; 3, convenient/flexible installation; 4, waterproof; 5, load-bearing ... halls, gymnasiums, freezing stores, purification workplace, etc. ... Fireproof heat insulation rock wool sandwich panel