Introducing our new product: ARC Open State Cavity Barrier

25th January 2022


ARC OSCB is an open state cavity barrier for ventilated cavities.

  • Reactive intumescent element
  • Either 60min or 120min fire integrity
  • 25mm or 44mm air gap for ventilated cavity
  • Tested for ASFP TGD19 standards
  • Fixing brackets included as standard
  • Suitable for use horizontally

ARC OSCB is designed for installation within cavities where ventilation is required in service use. Manufactured from non-combustible rockfibre mineral wool with a reactive intumescent layer, the cavity barrier can provide an air gap of up to either 25mm or 44mm.

The intumescent layer will rapidly expand when exposed to heat in a fire event, closing off the air gap and preventing vertical fire spread within the external cavity.

Suitable for installation horizontally, ARC OSCB should be partnered with ARC Fire Stop Slab installed vertically for a complete cavity fire barrier solution.

Click here to learn more about ARC OSCB