25 PACK - Fire Door Seal Strip - 2100 x 15 x 4mm- Intumescent Fire Stop- White This 25 pack of Intumescent Door Seals will allow you to seal (approximately) 10 fire doors. You will receive 25 x 2.1m strips that can be cut down to size for fitting around approximately 10 doors. If you are looking to seal less than 10 doors, we also supply these strips in 5 pack (approx. 2 doors). Please see our other listings or contact us if you have any questions., Manufacturer: Loops