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CP 674

Aluminium-faced cavity closer with mineral wool core and intumescent capabilities for sealing building envelope cavities to prevent the spread of fire. It creates a barrier to fire in the cavity of rainscreen cladding and façade systems for up to 30 minutes integrity and 30 minutes insulation, with versions for both vertical and horizontal applications. Can be used in ventilated rainscreen cladding façades with gaps of 25 mm or less.

Features/ Benefits:

  • Ready-to-use product, easy to fit.
  • Wide range of sizes to suit most cavity gaps.
  • Stainless steel brackets with an expected lifespan of 30 years.
  • Age resistance tested to simulate 30 years of wetting/ drying cycles.
  • Fire resistance rating of up to 30 minutes.

General information


Mineral wool with aluminium facing

Uniclass 2015

Pr_25_80_80_42 Intumescent coated foil mesh flexible cavity barriersPrimary


P10/432 Cavity barriers

P10/435 Ventilated cavity barriers

P10/77 Ventilated cavity barriers

P12/360 Mineral wool rigid batts

P12/40 Mineral wool rigid batts

Specification data - Intumescent coated foil mesh flexible cavity barriers

Product Reference

CP 674




Cavity width

Insert requirement, available 41–403 mm.

Standard product features


Mineral wool with aluminium facing.

Fire resistance:

Up to 30 minutes.

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