Graphite Fire Draft Seal (Single Blade), Brand Name : SEALz

SEALz Fire Draft Seal (SB) is a dual performance seal with a single neoprene blade which under normal circumstances improve the acoustic performance of a fire resisting door through sealing of air gaps between door leaves and frames.  In the event of fire, the intumescent flex reacts and forms a voluminous intumescent foam in ealing the air gap between the door leaves and frames of the fire resisting