... ,national defence,transportation and other industries. Ideal material for heat insulation and sound insulation of industrial facilities such as tank,boiler,flue ... than 10 countries/regions abroad.SIMPLEX FELT: With fine heat insulation property and sound absorption effect it is applicable to big ... wool felt≤1Rock wool pipe≤3.5Hydrophobicity(%)>98Tally with GB5480 Heat Insulation Rock Wool Blanket