... put in moderate bonder and make it solidified,tha's the core material.Rock wool panels are ... 4.Energy conservation, environmental protection, economical, heat insulting, good structure, easy-doing construction.5.Light weight enough to ... halls, gymnasiums etc.advantagesLight in weight,Heat-insulation, good sound insulation ,fireproofGood durability, waterproof,fireproof,recycled usingCompetitive ...