5 PACK - Fire Door Seal Strip - 2100 x 10 x 4mm- Intumescent Fire Stop- Brown These 5 packs of Intumescent Door Seals will allow you to seal (approximately) two fire doors. You will receive 5 x 2.1m strips that can be cut down to size for fitting around TWO doors. If you are looking to seal more than two doors, we also supply these strips in 25 packs. Please see our other listings or contact us., Manufacturer: Loops