Firestop gap sealant is an eco-friendly single-component firestop material that can quickly and effectively seal hard-to-reach gaps. It's suitable for joint seals between curtain walls and floor edges as well as gaps with high elongation. It boasts excellent airtightness and watertightness, and has superior elastic deformation capabilities. It doesn't crack upon use and expands when heated during a fire, quickly sealing the gaps left by the combustion of flammable materials. This prevents the spread of fire and smoke through the facade, reducing the extent of fire damage.