Flame retardant sealing strip
Fire and flame retardant sealing strips are mainly used between the door leaf and 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 doors 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, or can be fixed in the groove of the fire door with small nails.