Envirograf FB70 Fire Barrier Curtain

Availability: In Stock


The Envirograf FB70 curtain is a 1.2mm thick by 1.22m wide curtain, which can be ordered per linear metre.

It can be attached to a wide variety of surfaces and structures, including trunking, steel and timber.

As this barrier is non-fibrous and dust-free, it is suitable for clean rooms, hospitals and computer suites.

The FB70 fire curtain comes in both acoustic and non-acoustic formats.

It can achieve up to 81 minutes integrity and has a Class 0 spread of flame fire rating.

PRICED PER LINEAR METRE (maximum 40m per roll).

FB70 Fire Curtain

The Envirograf FB70 fire curtain is a 1.2mm thick reinforced glass cloth coated with yellow intumescent coating on one face. It is available in 1220mm widths, in either a standard or acoustic form.

FB70 barriers can achieve up to 81 minutes fire integrity when installed correctly.

For use on steel and timber trusses and between concrete soffits and suspended ceilings. It can also be affixed to trunking.

Often Envirograf’s metal straps are needed for installation.

This fire curtain can be installed both horizontally and vertically, around door frames, cable trays, ducting and partitions.

PRICED PER LINEAR METRE (maximum 40m per roll).

The Envirograf FB70 curtain is ideal for use in:

  • Clean rooms, computer suites & hospitals. This is because it is a non-fibrous and dust free material
  • Loft areas
  • From ceilings to the top of partitions
  • Under computer floors

The insulated version has Envirograf’s sponge attached to one face of the cloth.


In many cases, services can pass through the curtain if appropriately fire sealed with products such as Envirograf’s pipe collars and multi-purpose fire box.


Application Instructions:

All curtains are supplied with sufficient adhesive for the 50 mm overlap. The adhesive can be applied to one face and pressed together, although it is best to apply a small layer to each face and apply

together, giving a much quicker hold.

Just hold together for approximately 1 minute, to allow the adhesive to grip. 1 litre of Adhesive is sufficient for 50 metres of curtain.

Should the Curtain be installed in a windy area, Envirograf ST50 or ST75 Class 0 Adhesive Tape can be applied over the glued joint to hold it more securely while the Adhesive dries.

For fixing the top, bottom and ends of the Curtain: For timber supports use Envirograf FB/T Battens, fixed through to the timber with 30 mm large head clout nails. For concrete, block or brick fixing, use

FB/C Metal Straps – 25 mm wide, with 2 mm holes every 300 mm apart. These can be fixed with spit nails, screws, pop rivets (steel) or self-tapping screws to the steel work.

Where cutting around services is required;

  1. Wrap around the service with a section of the curtain and adhere together using the adhesive.
  2. Cut a cross – X – in the barrier to allow the service through. Once the service is wrapped, adhere the cut area of the curtain to the wrapped service.
  3. If necessary, fit a patch over the curtain with the adhesive, using a section of the curtain as the patch.


For our other fire curtains, please click here.


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