Rigid Box – Side Flipper

Rigid Box Side Flipper

Rigid Box – Side Flipper

Application: Fire resisting timber doorset
Fire Resistance Period: 30 to 60 minutes
Insulation/integrity: Integrity and insulation
Test Standard: BS 476: Part 20:22, BS EN 1634-1 & BS EN ISO 10140-2
Approval Type: Certifire CF822

Pyroplex® Flipper range provides fire, smoke and acoustic seals for timber door edges and frames. The flippers are thermally fused to the box section to ensure that under normal conditions of use they will not delaminate. This new technology ensures improved performance and also appearance of the seal. The Integral Flipper range adds added security with an integral flipper that will remain uninterrupted when used with ironmongery.

Pyroplex® Flipper range provides fire, smoke and acoustic seals, which are supplied in 2.1m lengths as standard and are quick and easy to fit with no special tools required.

Testing & Certification

Test Standard

BS 476: Part 20:22 – Fire

BS EN 1634-3

BS EN ISO 10140-2 – Acoustic

BS EN 1634-1 – Fire

BS 476 Part 31.1 – Smoke

Approval Type

Certifire TS35 and TS21. Certificate CF822

  • 30 and 60 minute systems available.
  • Provides fire, smoke and acoustic resistance.
  • Integral flipper maintained around ironmongery
  • Improved aesthetics – the profile is more streamline.
  • Increased tamper resistance – previously it has been easy to tear the flippers from the profile, a particular problem in educational establishments.
  • Durability – flipper will not remove from seal. Performance in accordance with Certifire Technical Schedules as outlined in CF822.
  • Supplied with a self-adhesive backer for ease of application.
  • Identification on each product ensures full traceability.
  • Available in a range of 6 standard colours.

Pyroplex® Flipper range of Rigid Box Seals have been specifically designed for use in the following applications:

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

Side Flipper

Part no.Dimensions30min fire resistance60min fire resistanceSmoke performanceAcoustic performance

1. Select the appropriate seal using the door test evidence, which will identify the size of intumescent seal required.
2. Route a groove suitable for the size of intumescent seal.
3. The intumescent seal can be interrupted to allow for ironmongery, whilst still maintaining an integral flipper.
4. Remove the release 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.


Seals are often partially interrupted by essential ironmongery such as hinges.  Pyroplex® Side Flipper maintains an integral smoke and acoustic seal when interrupted, due to the positioning of the flippers.

Pyroplex® Flipper range provides fire, smoke and acoustic seals, which have been tested to BS 476: Part 20:22, BS EN 1634-3: 2004 and BS EN ISO 10140-2: 2010. The Flipper range is compliant with the requirements given in Certifire TS35 and TS21. Certifire Certificate No. CF822.

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.