Installed around the door frame, the LPD Intumescent strip provides fire protection for both inswinging and outswinging doors. Designed to expand in the event of a fire, the intumescent strip is intended for use with all types of wooden, steel and aluminium fire doors. Intumescent Strips are ideal for use in protecting against fire risk on flammable or combustible surfaces. Often times, people use them to seal off the fireplace, gas lines, and chimneys from the outside of a house or building. The brown strip goes well with doors that are painted brown. This helps it blend into the door frame making it less of an eyesore.