FEATURES & BENEFITS
IMN/IMP is a two-part combined intumescent fire and smoke seal, specifically designed for the meeting stiles of FD30S fire and smoke-resisting door assemblies.
At the meeting stiles the seal consists of two opposing extruded aluminium alloy profiles – IMN and IMP – each with twin reservoirs which contain substantial reserves of Sealmaster intumescent material. IMN also holds a self-extinguishing elastomeric blade, which rest against IMP when the doors are closed. At the head and hanging stiles IMN is used on its own with the smoke seal making contact with the door or frame.
In normal use, the elastomeric blade seals the gap between the doors, and acts as an efficient draught seal.
As the fire develops, the elastomeric blade provides a barrier to the passage of smoke and hot gases. Once the fire reaches the IMN/IMP Intumescent Fire and Smoke Seal, the intumescent material foams, swells and fills the gaps between the doors. Since the foam remains soft during the period of intumescent action, it exerts minimal pressure, allowing the doors to remain in their original positions.
AUTHORITY
An IMN/IMP combination intumescent fire and smoke seal with elastomeric blade insert, has been tested on a double leaf, timber door assembly by TRADA. A fire resistance in excess of the 60 minutes was achieved. Copies of test results are available on request.
CERTIFIRE APPROVED
IMN/IMP intumescent fire and smoke seals have been tested and approved by Certifire to conform to BS476 part 22. This is the most demanding 3rd party certification scheme in the industry.
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