A fully identifiable, fire resistant ablative skinned rock mineral wool board offering up to four hours integrity and insulation, used for the re-instatement of service openings passing through fire compartment walls and floors.

Intubatt is a factory finished, multi-layered, low resin bonded, rock mineral fibre board. It is Firetherm ablative coated on both faces with Optifire-identifiable coating and manufactured under controlled factory conditions to ISO 9001 to the required thickness and specification. Intubatt may be over coated using a suitable emulsion or eggshell paint for decorative purposes.

Features and benefits:

  • Tested at Exova BM Trada to BS EN 1366-3, BS 476-20, BS 476-21 and BS 476-22.
  • Tested at Exova Warrington Fire to BS 476-20, BS 476-21 and BS 476-22.
  • Water repellent core.
  • Fully identifiable using Optifire.
  • Easy to cut and flexible.
  • Service movement up to 7.5% (±3.75%), maximum 3.75 mm.
  • Fire deflection ±3.75%, maximum 45 mm.
  • Fully tested for up to 240 minutes' integrity and insulation.
  • Service capable.
  • Air pressure tested up to 2000 Pa.


Intubatt is used to reinstate compartment wall and floor openings to maintain the required fire resistance and assist with the reinstatement of acoustic capability. It is suitable for use around services such as suitably supported fire rated dampers, pipe work and electrical cabling, against the passage of fire providing up to four hours integrity and insulation in blockwork and up to 120 minutes integrity and insulation in drywall.

- Typical service types:

  • Cables.
  • Steel pipes.
  • Insulated non-combustible services.
  • Copper pipes.
  • Cable trays.
  • Combustible pipes.
  • Dampers.
  • Ducting.

Standard product features


Low resin bonded, rock mineral fibre.


1 mm thick Firetherm ablative coating on both sides, incorporates Optifire traceability.


Off white.

Size (w x l):

600 x 1200 mm.


8 kg (±0.5 kg, 0.72 m²).

Maximum openings:

  • Framed: 3000 x 2400 mm flexible construction.
  • Wall: 1500 x 1500 mm, 2000 x 1100 mm.
  • Pattress: 1400 x 400 mm.


  • Fire resistance: Up to four hours' integrity and insulation.
  • Acoustic rating: Up to 59 dB within a 1 m² opening.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-45-70/427 Mineral wool fire stopping

NBS Specification

NBS Buliding logo
This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Firetherm Intumescent and Insulation Supplies Ltd


+44 (0)1322 551010

Product reference



[50 mm]
[70 mm]


[140 kg/m³]
[180 kg/m²]
Provides greater acoustic performance.

Manufacturer details

Unit F,
Acorn Industrial Park,
Crayford Road,
Kent, DA1 4FT
Tel +44 (0)1322 551010
Fax +44 (0)1322 552727
NBS Plus
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