The special rock wool board for curtain walls is used for fireproof sealing in the curtain wall structure. Mainly used for blocking and sealing smoke and fire in the gaps between curtain walls, structural floors, and partition walls, as well as in some areas of the system that are not visible to the naked eye, thus forming a fire barrier. By dividing buildings into independent areas through fire zones, it is possible to prevent the spread of fire within the building and achieve passive fire prevention in the event of a fire.