Rigid Box

Rigid Box

Rigid Box

Application: Fire resisting timber doorset
Fire Resistance Period: 30 to 120 minutes
Insulation/integrity: Integrity and insulation
Test Standard: BS 476 Part 20: 22, BS EN 1634-1  and BS EN 1363-1
Approval Type: Certifire CF355

Pyroplex® range of fire only Rigid Box Seals provide a traditional fire only seal for fire rated timber door edges and frames. They are suitable for rebates in single and double action, single or double doors. Pyroplex® Rigid Box Seals are ideal for new build applications.

Pyroplex® fire only Rigid Box Seals are supplied in 2.1m lengths as standard and are quick and easy to fit with no special tools required. They are supplied with an acrylic self adhesive tape backing for ease of application.

Pyroplex® fire only Rigid Box Seals are tested to BS 476: Part 20:22 and BS EN 1634-1 and other international standards and are compliant with the requirements given in Certifire TS35.

Testing & Certification

Test Standard

BS 476: Part 20|22 – fire

BS EN 1634-1 – fire

BS EN 1363-1 – fire

Approval Type

Certifire TS35 and TS21. Certificate CF355

  • 30, 60, 90 and 120 minute systems available.
  • Provided with rigid box outer for added durability.
  • Supplied with a self-adhesive backer for ease of application.
  • Cut to 2.1m as standard.
  • Identification on each product ensures full traceability.
  • Available in a range of 6 standard colours.

Pyroplex® fire only Rigid Box Seals have been specifically designed for use in the following applications:

  • Rebates in timber door leafs or door frames.
  • Use on single and double action leaf doors.
  • Use on latched and unlatched doors.
  • New build and retro-fit applications.

Rigid Box Seal

Part no.Profile Dimensions [W x D mm]30 minute fire resistance*60 minute fire resistance*90 minute fire resistance*120 minute fire resistance*

For further guidance on the relevant core and configuration refer to the Global Assessment Chilt/A08215 Rev A

1. Select the appropriate seal using the door test evidence, which will identify the size intumescent seal required.

2. The seal needs to be located centrally in either the door leaf or frame.

3. Route a groove suitable for the size of intumescent seal selected.

4. Clean the rebate to remove any dust. Remove the self-adhesive backing liner from the product and push fit into the routed groove.

5. To achieve excellent adhesion seals must be applied to clean, dry surfaces at temperatures between +5°C and +40°C.

Pyroplex® fire only Rigid Box Seals are tested to BS 476: Part 20:22 and BS EN 1634-1 and are compliant with the requirements given in Certifire TS35.

Test reports and international standards
BS 476: Part 20Certifire TS35
BS 476: Part 22UL10C
EN 1634-1ISO140-3: 1995

Providing the product is installed in accordance with the requirements of the guidance document the product is guaranteed for a period of 10 years. All Pyroplex® products are identified with a unique reference number for traceability purposes.