Therm-A-Seal is a new generation of intumescent fire seal, designed for use in fire door assemblies which are required to control the spread of fire through buildings. The PVC casings contain an expandable graphite-based intumescent compound which unlike some products, is unaffected by moisture in the air and so does not require to be carefully protected when fitted. The seals are rebated into the door's head and jambs.

Therm-A-Seal is suitable for

FD20, FD30 and FD60 single and double doorsets in timber, steel (or both).
Single action and double swing doorsets (latched or unlatched).

Therm-A-Seal is available in brown, white, cream, red and a variety of wood grain effects.

Therm-A-Seal is supplied in standard lengths of 1050mm and 2100mm (with or without double-sided self-adhesive tape on the underside of the PVC casing). It is available in the following nominal dimensions: 10 x 4mm, 15 x 4mm, 20 x 4mm, 25 x 4mm, 30 x 4mm and 38 x 4mm.

Therm-A-Seal has passed numerous tests carried out in accordance with BS 476 : parts 20 & 22 (details available on request).

Typical Applications

Latched single-leaf, single-swing 30 minute (FD30) timber fire doors: Single length of Therm-A-Seal 10 x 4mm down each jamb & across the head.

Un-latched single-leaf, single or double-swing 30 minute (FD30) timber fire doors: Single length of Therm-A-Seal 10 x 4mm down each jamb & depending on the door a wider section may be required across the head.

Latched single-leaf, single-swing 60 minute (FD60) timber fire doors: Single length of Therm-A-Seal 20 x 4mm down each jamb & across the head. Un-latched doors may require additional protection across the head.