Pyroplex 8492 Glazing Seal – 10 × 2.5mm is a slim, flexible and self-adhesive intumescent glazing strip designed for use within approved 30-minute fire-resistant glazed apertures.
The strip is fitted to the glazing bead as part of a complete fire-glazing system. During normal conditions, it forms a compact sealing layer within the glazing pocket. When exposed to elevated temperatures during a fire, the intumescent material expands to help seal the space around the glass and restrict the passage of flames and hot gases.
The stocked range is supplied in:
Pyroplex 8492 forms part of the manufacturer’s FG30 glazing range.
It has been developed for suitable glazed apertures in:
The strip does not provide a fire-resistance period independently. Its performance depends on the complete tested or assessed glazing assembly.
The 10 × 2.5mm profile provides a particularly slim glazing-pocket arrangement.
It is designed for approved economical glazing-bead systems where a compact intumescent strip is required without a projecting glazing fin.
The slim profile can help provide:
The 8492 must not be substituted for a larger, finned or differently shaped glazing seal unless the complete doorset evidence permits the alternative.
Pyroplex specifies the 8492 glazing strip for compatible fire-resistant glass between:
5mm and 7mm thick
It may be used with approved:
The exact glass manufacturer, product, thickness and maximum aperture dimensions must be supported by the relevant fire-door or glazing-system evidence.
The glazing strip has high-performance self-adhesive backing for attachment to a clean glazing bead.
The adhesive helps retain the strip while:
The adhesive is an installation aid only. It does not structurally retain the glass or replace the required glazing beads, screws, setting blocks or aperture lining.
Pyroplex 8492 is supplied as a continuous flexible strip rather than individual pre-cut lengths.
This format helps:
The strip should not be stretched while it is measured or installed. Stretching may cause it to retract and leave gaps at the bead corners.
The Pyroplex FG30 glazing range has been tested to standards including:
Pyroplex currently lists the product under Certifire TS25 Certificate CF348.
Before relying on certification for a live project, confirm the current certificate revision and the permitted:
The resulting fire performance depends on the complete glazed assembly, including:
No standalone fire, smoke or acoustic rating should be assigned to the strip itself.
Pyroplex describes its intumescent glazing material as robust, non-flaking, resistant to tearing and unaffected by water.
The material should still be kept clean and dry before installation to protect its adhesive backing and prevent contamination.
Do not paint, coat, remove or modify the intumescent strip after installation.
Pyroplex publishes the 8492 as a 250m standard coil. The 10m option is the shorter format included within the supplied stock range.
The stocked product is available in:
Black only
The strip is normally concealed behind the glazing bead, although a narrow sightline may remain visible depending on the complete bead and glass arrangement.
Calculate the required quantity from the perimeter of each glazed aperture.
Allow for:
Before ordering, confirm:
Do not select a glazing seal solely by its dimensions. Every component must match the complete tested or assessed fire-glazing system.
| Product Name | Pyroplex 8492 Glazing Seal – 10 × 2.5mm |
| Manufacturer | Pyroplex |
| Manufacturer Part Number | 8492 |
| Supplier Product References | PYR8492/10M and PYR8492/250M |
| Product Type | Flexible self-adhesive intumescent glazing strip |
| Profile Design | Slim plain glazing strip without an integral fin |
| Nominal Profile Size | 10 × 2.5mm |
| Application | Approved glazed apertures in fire-resisting timber and steel doors |
| Fire-Resistance Period | 30 minutes as part of a suitable tested or assessed glazing system |
| Suitable Glass Thickness | 5–7mm |
| Suitable Glass Types | Insulating and non-insulating fire-resistant glass, subject to supporting evidence |
| Fixing | High-performance self-adhesive backing applied to the glazing bead |
| Integral Glazing Fin | No |
| Stocked Roll Lengths | 10m and 250m |
| Manufacturer Standard Coil | 250m |
| Colour | Black / graphite |
| Test Standards | BS 476: Part 20/22, BS EN 1634-1 and BS EN 1363-1 |
| Approval Reference | Certifire TS25 Certificate CF348; confirm the current revision and scope before reliance |
| Standalone Fire Rating? | No — performance belongs to the complete tested or assessed glazing system |
| Standalone Smoke Rating? | No separate cold-smoke classification should be assumed |
| Standalone Acoustic Rating? | No |
| Roll Length | Profile Size | Colour | Product Code |
|---|---|---|---|
| 10m | 10 × 2.5mm | Black | PYR8492/10M |
| 250m | 10 × 2.5mm | Black | PYR8492/250M |
| Roll-Length Options | Profile Options | Colour Options | Total Variations |
|---|---|---|---|
| 10m and 250m | 10 × 2.5mm | Black | 2 |
The supported fire performance depends on the complete glazing construction, including:
Pyroplex’s current product instructions specify:
The current project-specific door certificate or assessment takes precedence where it expressly permits a different arrangement.
Store the product:
Do not install material that is:
Pyroplex 8492 must be installed as part of an approved fire-resistant glazing system.
The door, aperture, glass, hardwood liner, glazing beads, mechanical fixings and intumescent strips must all match the current test evidence, certification or doorset assessment.
Confirm:
Do not cut or modify a certified fire door without evidence permitting the glazed aperture.
Check that the prepared glazed aperture is:
Stop work if the exposed door construction does not match the expected tested or assessed doorset.
Pyroplex’s current published arrangement requires the aperture to be lined with:
6mm hardwood
Install the liner continuously around the aperture with closely fitted corner joints.
Do not omit or alter the liner unless current project-specific evidence expressly permits a different arrangement.
Prepare the glazing beads to the material and dimensions specified by the approved system.
The surfaces receiving the self-adhesive strip must be:
Unwind the Pyroplex 8492 strip without stretching it.
Remove the release liner progressively and press the adhesive face firmly against the glazing bead.
Ensure that:
Cut the profile cleanly using sharp scissors or a suitable knife.
Do not:
Mitre cut the glazing beads with the Pyroplex strip already attached.
Check that:
Fit one complete side of the glazing-bead system into the lined aperture.
Under Pyroplex’s current published arrangement, secure the beads using:
The current doorset certificate or assessment takes precedence if it specifies a different approved fixing arrangement.
Pyroplex’s published instructions require the glass to be cut to the aperture with a tolerance of:
±2mm
Confirm that the supplied glass:
Install the approved glazing setting blocks where required by the complete system.
The setting blocks support the weight of the glass and maintain the required edge clearances.
Do not use the Pyroplex strip as a structural glass support.
Place the glass into the aperture using suitable handling equipment.
Check that:
Prepare and install the opposing bead assembly using the same process.
Secure the beads with the specified mechanical fixings.
As the beads are tightened, confirm that:
Inspect every bead and corner on both faces.
Confirm that:
Inspect the complete glazed aperture as part of the fire-door maintenance programme.
Check for:
Pyroplex 8492 does not independently provide a 30-minute fire rating.
Performance depends on the complete approved glazing system, including:
Install the product only in accordance with current certification, test evidence, assessment documentation and the instructions applicable to the complete glazed doorset.
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