TL18FIRE – Rytons 9×6 Intumescent RytBlock

General Details

TL18FIRE – Rytons 9×6 Intumescent RytBlock

  • Heavy duty intumescent grille for walls and ducts.
  • In the event of a fire the slats fuse together and give a complete seal in 2 minutes.
  • Gives 3 hours protection preventing the passage of smoke and gases.
  • Tested in accordance with BS476 Parts 20 and 22.
  • Temperature increase insulated for 22 minutes.
  • Steel framework protects surrounding intumescent materials by preventing the inward deformation.
  • May be used in high humidity.
  • Compatible with Rytons 9×6 AirLiner® cavity liners.

Free Area:

  • 13,390mm² (133.9cm²) per unit.


  • 206mm L x 124mm H x 44mm D (see image gallery above).
  • CAD drawing available by email.


  • Steel grey.


  • Steel framework protecting intumescent materials.


  • Position the intumescent block between the baffle and air brick externally or at the internal end of the adjustable cavity liner sleeve (whichever location has the greater fire risk).  Note: If using the intumescent block at the internal end of Rytons ‘9×6’ Acoustic AirLiner then angle the intumescent block between the foam panels.
  • Important: If positioning externally, ensure the wall is of a sufficient thickness (103mm minimum) to allow the intumescent block to be surrounded by brick or blockwork once installed.  The intumescent block must be completely surrounded by brickwork or blockwork for successful deployment.

Handling Information:

  • Weight: 0.571kg.

NBS Plus Specification: