This bulk pack contains full length intumescent strips for twenty doors. The strip comes supplied without a brush seal and is suitable for a fire only door.Rapid high-pressure multi-directional expansion.Mineral based: safe to handle, containing no fibrous material or harmful chemicals.Unaffected by moisture, humidity, atmospheric pollution and other common industrial and household chemical substances.Laboratory ageing tested for 100 years.Supplied with self adhesive backing for ease of installation.Certifire Certification CF846.