Characteristics of fire-retardant seal
In case of fire, the expansion sealing strip expands rapidly above 200°C, has strong flexibility, good cold resistance, water resistance, acid, alkali, and salt resistance. It has obvious advantages and can effectively prevent the spread of fire. The use of fire-retardant sealing strips, fire-retardant sealing strips are mainly used between the door leaf and door frame, door leaf and door leaf of steel doors and wooden doors. When a fire breaks out, the fireproof expansion sealing strip automatically expands to block the gap between the door and isolate the air circulation between the two spaces, effectively avoiding the damage to the human body by the thick smoke, toxic gas and hot air in the early stage of the fire and controlling the fire extension . The sealing strip can be glued into the groove of the fire door seam, or can be fixed in the groove of the fire door with a small nail.