Fireproof Gap Sealing Material is an environmentally friendly single-component fireproof sealing material that can quickly and effectively seal hard-to-reach gaps. It is suitable for joints between curtain walls and floor edges as well as large elongation gaps. It boasts excellent airtightness and watertightness, with superior elastic deformation capabilities. It does not crack upon use and expands upon heating during a fire, quickly and effectively sealing the voids left by the combustion of flammable materials. It prevents the spread of fire and smoke through the curtain wall, reducing the extent of fire damage.