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THERM-A-STOP has been designed for use in fire resisting door assemblies which have been designated as smoke control doors.The seal slows the spread of smoke and fire through a building by reducing the flow of smoke and air through the gaps between the leaf and the frame or an adjacent leaf edge during the early stages of a fire. Activated by heat, the material rapidly expands to seal the air gaps between the leaf and frame, insulating and protecting the gaps - thereby significantly slowing the spread of fire through the doorset.
THERM-A-STOP is suitable foruse on fire resisting door assemblies manufactured from timber, steel or combinations of both.
The height of the pile projects 5 mm from the PVC holder and is generally suitable for sealing an average gap of 3 mm to 4 mm between door and frame.