THERM-A-STOP
The installation of intumescent fire and ambient
temperature smoke seals around fire door assemblies are
essential to meet the requirements of the Building
Regulations. For some applications fire, only seals are
acceptable but for life safety smoke control is essential.
Once activated intumescent seals will contain hot smoke
but cold smoke protection requires the addition of a cold
the smoke seal which is normally incorporated into the
intumescent seal.
The Product
THERMAL TOP has been designed for use in fire resisting
door assemblies which have been designated as smoke
control doors. The seal slows the spread of smoke and
fire through a building by reducing the flow of smoke
and air through the gaps between the leaf and the frame
or an adjacent leaf edge during the early stages of a
fire. The reduced flow of air through the door assembly
also restricts the growth of the fire by reducing the
amount of oxygen available.
Activated by heat, the foam rapidly expands sealing the
air gaps between the leaf and frame, forming a compact
mass of heat-resistant graphite insulating and retarding
the spread of the fire through the doors.
THERMAL TOP is suitable for use on fire resisting door
assemblies manufactured from timber, or timber doors
with steel frames.
Description
The THERMAL TOP formulation is based on expandable graphite. The seal is supplied in a PVC casing. Unlike many other types of intumescent material, THERMASTOPis unaffected by atmospheric moisture and therefore does not require any further protection. It is also immune to degradation by carbon dioxide in the atmosphere. THERMASTOP contains a high-density ambient
temperature pile seal which has a polypropylene fin for improved smoke and air control at lower temperatures.THERMASTOP intumescent fire and smoke seals are also designed to perform the function of a conventional draught seal in daily use.
