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Intumescent coated, non-fibrous slabs

Product 5


Non-fibrous intumescent slabs that can be cut to allow services to pass through

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Non-fibrous Intumescent Slabs

A high density, fire-resistant sponge with either black or white intumescent coating on both main faces. These slabs are suitable for use as a permanent fire barrier in walls, floors and ceilings, as well as around services. Due to its pliable material, it can be easily cut to any size using a sharp blade. Suited for areas where fibres are not permitted to avoid irritation to skin, eyes and the respiratory system, such as computer rooms, theatres as well as food preparation areas.


– Due to its high density, it can be used for large openings in floors, walls and ceilings

– Non-fibrous material is ideal for use in sterile areas or clean rooms

– Ideal for use under raised flooring as a firebreak, providing 1-4 hours fire protection

Application Instructions

Envirograf NF Slab is cut to suit the opening size and you cut around any services
like a jigsaw, adhering each section or joint with the jointing compound.
Where services are PVC, i.e. Pipes and cables, Envirograf Wraps should be used,
50mm wraps for two hour fire protection and 100mm wide wraps for four hour
protection. The wraps can also be fitted around steel, copper and aluminium pipes to
stop the pipes overheating and passing the heat from one side to the other of the fire
When fitting NF Slabs in a floor opening and the mesh is being used to help supports
the slabs, the wire mesh should be laid into the opening, bending up the sides and
fixed with screws, raw-plugs and large washers, or split nailing with large washers.
Then lay the slab on top of the mesh adhering all the sides with jointing compound
and all cut joints. The whole barrier will dry hard in 10 minutes.
Where cable trays pass through the barrier so Envirograf Intumescent E1/20/30
should be fitted over cables.

Case Studies

Order References / Sizes

REF                        THICKNESS         SLAB SIZE                            PROTECTION                                                                  

NF50/5                   50mm                     500mm x 1000mm           2 hours                  White Coated

NF50/7                   50mm                     750mm x 1000mm           2 hours                  White Coated

NF50/10                 50mm                   1000mm x 1000mm           2 hours                  White Coated

BNF50/5                50mm                     500mm x 1000mm           2 hours                  Black Coated

BNF50/7                50mm                     750mm x 1000mm           2 hours                  Black Coated

BNF50/10              50mm                    1000mm x 1000mm          2 hours                  Black Coated


* Jointing compound supplied