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  Home > Fire Stop Products > Cladding Seals

Fire Rated Cavity Seals.

Ventilated Fire Barrier for use behind cladding.

  • Creates a fire barrier within the cavity.
  • Allows air circulation until activated by fire.
  • Tested to BS 476 Part 20
  • 30-120 minutes fire rating
  • Horizontal and Vertical use
  • Suitable for ventilated cavities from 15mm

Many external wall systems are designed with an open cavity to provide back ventilation. The cavity acts like an open chimney to allow for moisture dissipation and to create a back pressure to repel rain ingress.

However in the course of a fire this 'chimney effect' is an open path for the spread of fire, both vertically and horizontally, behind the external wall system.

A potential fire spread risk with rainscreen cladding in the 'chimney effect' of the ventilation space.

Fire rated cavity seals maintain the ventilated cavity in normal conditions, leaving a continuous free air space, but, in the event of a fire, the intumescent fire barrier will quickly expand to seal off the cavity to prevent the spread of fire.

For more information please view the following PDF files:

Cavity Seal - up to 25mm cavity.Cavity Seal - up to 25mm cavity.
30 minute fire rated seal for fitting behind exterior cladding to enhance fire protection.
£8.17
Cavity Seal - up to 50mm cavity.Cavity Seal - up to 50mm cavity.
Rated 30 to 120 minute (fire rating varies with underlying structure). For fitting behind external wall systems to enhance fire protection.
£20.34
Cavity Seal - up to 125mm cavity.Cavity Seal - up to 125mm cavity.
Rated 30 minutes. For fitting to larger cavities behind exterior cladding to enhance fire protection.
£33.54
Cavity Seals - Custom SizesCavity Seals - Custom Sizes
For customer specified cavity widths greater than 50mm


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