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ISL Brand

ISL Therm-A-Bead | Fire Resistant Glazing Seal

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Product Code: TB21IS
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ISL Therm-A-Bead is a fire resistant glazing seal developed to provide a reliable 60 minute resistance for timber fire doors in conjunction with suitable fire resisting glass and timber glazing beads.

Therm-A-Bead is a PVC-u holder featuring a high expansion phosphate based intumescent material, designed to provide a masking effect on the beads with maximum insulation between the glass and the bead.

Timber doors present particular problems in 60 minute applications when using uninsulated glass, due to the high temperature of the glass and the erosion of the door and beads during a fire test. The Therm-A-Bead is a perfect solution for this. To achieve a complete dry glazing system the Therm-A-Bead should be used in conjunction with a Therm-A-Line, a specially formulated intumescent with erosion resistant qualities that seals around the perimeter of the aperature.

Intumescent fire seals are an essential element of a glazing panel in a timber fire door set designed to meet the criteria of BS 476: Parts 20 and 22: 1987. The Therm-A-Bead glazing seal along with a Therm-A-Line has been successfully fire tested to these requirements in two 54mm FD60 timber fire doors – reference TRADA test FR1632 – 14/7/92.

Therm-A-Bead is supplied in 25mm width and in either a white, brown, black or a cream colour, with a self-adhesive tape which make the application process very quick and simple.

Brand: ISL

Use Case: Fire

Applications: Doors & Windows

Test Certification: Fire Tested to BS 476 Part 20 & 22: 1987, TRADA Tested to FR1632, Certifire Approved CF 284

Fire Rating: 60 Minutes

Material: PVC-u Carrier, Mono-ammonium Phosphate Intumescent

Finish: White, Brown, Black, Cream

Fixing: Self Adhesive for Surface Mount

Included: 1x ISL Therm-A-Bead, 1x Self Adhesive Backing

Therm-A-Bead Width mm: 25mm

Therm-A-Bead Thickness mm: 4mm

Therm-A-Bead Length mm: 2100mm

Date Added
ISL Therm-A-Glaze 30 & 60 Technical Data Sheet
17 October 2022
Technical Data Sheet
ISL Therm-A-Glaze 30 Fire Test Report
17 October 2022
Test Evidence
ISL Therm-A-Glaze 30 & 60 Certifire Test Report
10 January 2023

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ISL Therm-A-Bead | Fire Resistant Glazing Seal
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