Nullifire FV060 Ventilated Facade Cavity Closer


Nullifire (Firetherm) FV060 Ventilated Facade Cavity Closer, a fire barrier for use within rain screen cladding systems that maintains fire integrity for up to 60 minutes.

  • Not for use with combustible cladding types
  • Available in 1200mm lengths
  • For 50mm and 25mm cavities
  • Maintains compartmentalisation, preventing the spread of fire and smoke
  • Allows free airflow and drainage
  • Prevents mould growth and dampness in cavities

To qualify for Express (1-3 day) shipping, basket value must exceed £75.00 + VAT. Orders below this amount will only be available on Economy (7-10 day) shipping

£26.87 Incl. VAT
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Available for Delivery (See Delivery Options Below)

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Size References

Not recommended for us against combustible cladding; the integrity and insulation of Rainbar is limited by the capability of surrounding substrates.


Product Size Max. Free Air Space Maximum Cavity
Rainbar 1200 x 60 x 8 mm 50 mm 58 mm
Rainbar 1200 x 60 x 4 mm 25 mm 29 mm


Product Size Use
Rainbar Spike Small (165mm long) Fixing
Large (340mm long)
V-Lock (made to order dependent on cavity width)
Z Clips 300 x 30 x 0.8 mm For fixing to non-fire-rated cladding

Nullifire FV060 Ventilated Facade Cavity Closer fire barrier provides fire protection for cavities in a rain-screen cladding system, maintaining compartment lines to the exterior of a building. The design leaves a gap for free airflow movement and the drainage of moisture, preventing mould growth and dampness within the cavity, with a polymeric encapsulation ensuring pooling water does not remain on the face of the Rainbar.

Made from a high pressure graphite-manipulated intumescent composite contained within a waterproof seal, the Rainbar cavity barrier expands across a cavity when attacked by fire, sealing up gaps and maintaining fire integrity for up to 60 minutes. By slowing down the spread of fire more time may be allowed for evacuation, potentially saving lives, and preventing further cosmetic or structural damage to buildings.

The simple fixing system allows for speedy installation on site. Rainbar is both lightweight and durable and requires no further maintenance and requires no further sealing.


  • Ultra-slim design ensures easy installation in awkward situations
  • Fully tested at Exova BM TRADA up to 60 minutes integrity
  • Lightweight and durable
  • No maintenance, no further sealing required


Fixing centres may not exceed 400 mm. Joint to joint fixing centres may not exceed 400 mm and may not be less than 100 mm from the joint.

All pieces exceeding 600 mm require a minimum of 3 fixings.

Minimum fixings cut pieces 300 mm - 600 mm = 2 (100 mm from joints). Smaller pieces always require two fixings at equal distance from the centre line.

Fixings should be located centrally through the depth of the product +/- 5mm to the centre line.

Fire Testing

Tested at Exova BM Trada to BS EN 1363-4

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and Conditions and should be applied only by an individual with the necessary expertise and experience. We will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.

Product Details

Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.

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