A sealing system will:
The kind of seals needed will generally be determined by the door's location, and what the door needs to do. A timber fire door will invariably need an intumescent seal to meet performance expectations – and practically every fire door also needs to act as a barrier to ambient temperature smoke.
In some other cases, the seal may be quite specific to a particular environment , many sealing systems are designed to fulfil a number of functions. For example, a fire door may very often be combined with a Threshold plate and ramp, Astragals, Brush seals, Finger guard or other Architectural Seals