INTUMESCENT SEALS THERM-A-SEAL

Article No. 801137411

Width (mm): 10. Thickness (mm):4.Length(mm):2100

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THERM-A-SEAL

The installation of intumescent fire seals around fire door assemblies is essential to meet the requirements of BS5588 'Fire precautions in the design and construction of buildings'. To meet this requirement Intumescent Seals has developed a unique intumescent formulation representing a breakthrough in intumescent product
technology.

The Product

THERMASEAL has been developed primarily for sealing the air-gap between the edges of the leaves and the
frames, or between the separate leaves, of both timber and steel fire-resisting door assemblies in the event of a
fire. In a fire situation, an intumescent foam is produced which is voluminous and also capable of exerting a pressure. high enough to restrain the edges adjacent to the seal.THERMASEAL is therefore ideally suited to applications where some applied restraint combined with the normal gap-filling properties of intumescent materials is needed. Unlatched door leaves or double swing assemblies are most likely to benefit from such characteristics across the head, although the seal is equally well-suited to conventional latched single-leaf doors.

Description

THERMASEAL is made from a unique chemical formulation based on expandable graphite. The seal is supplied in a PVC casing of various colours. The core material THERMAFLEX is capable of large expansion combined with significant pressure forming an excellent seal against the ingress of fire. Unlike many other types of intumescent material, THERMASEAL is not affected by moisture and therefore does not require any further protection; it is also unaffected by carbon dioxide.

Specification
Application

THERM-A-SEAL

The Product

Description

Application

For most latched single-leaf single-swing 30 minutes (FD30) timber fire-resisting door assemblies, a single 10 mm x 4 mm strip of THERMASEAL down each jamb and across the head will normally suffice. Unlatched single-leaf assemblies may be satisfied with a 10 mm x 4 mmTHERMASEAL but, depending on the nature of the door, it may be necessary to increase the size to 15 mm x 4 mm.

Some latched single-leaf single-swing 60 minutes (FD60) timber fire-resisting door assemblies will satisfy the requirement of the BS476: parts 20 and 22: 1987 test procedures when fitted with a single 20 mm x 4 mm strip across the head and down both jambs. If improved performance is required a pair of 15 mm x 4 mm will ensure better protection around the hinges and across the head.

The intumescent foam produced by THERMASEAL has high-temperature tolerances and so is well suited for use with steel framed timber door assemblies where conventional intumescent foams may break down.