• Envirograf Intumescent Coated Non Fibrous Slabs

Envirograf Intumescent Coated Non Fibrous Slabs

Product 5

Unfortunately, we no longer stock this product; please contact our technical team on 0113 2455450 (option 2) or send a message to [email protected] where we will be happy to offer you up to 10% off a suitable alternative product for your project.



Order References

Ref Thickness Size Fire Protection
NF50/5 50mm 500mm x 1000mm Up to 2 hours (White coated)
NF50/7 50mm 750mm x 1000mm Up to 2 hours (White coated)
NF50/10 50mm 1000mm x 1000mm Up to 2 hours (White coated)
BNF50/5 50mm 500mm x 1000mm Up to 2 hours (Black coated)
BNF50/7 50mm 750mm x 1000mm Up to 2 hours (Black coated)
BNF50/10 50mm 1000mm x 1000mm Up to 2 hours (Black coated)

Use Envirograf Intumescent Coated Non Fibrous Slabs to compartmentalise rooms and spaces in floors, walls and ceilings, cutting easily with a knife to fit the fire slabs around pipes and wires like a jigsaw, sealing with the included jointing compound. The fireproof slabs, also referred to as a Fire Batt, have an anti-fire coating that expands in fire to seal up any gaps around the slab, helping prevent fire and smoke penetrating for up to 2 hours.

The non-fibrous material is ideal for use in clean rooms and sterile environments such as hospitals, computer rooms, IT departments, etc, and can be painted over and decorated. The high density fire retardent slabs can be used for large openings in walls, ceilings and floors, and make a good firebreak in a raised floor for extra protection.

Installation Suggestions

The fire slabs are self supporting in horizontal holes up to 1500mm² and in vertical openings up to 700mm x 900mm, after which a chicken wire type mesh should be used. All Slabs are supplied with a Jointing Compound. In most cases only a sharp Knife, small trowel and putty knife is required.

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 barrier.

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.


Envirograf NF Slabs should be stored in clean dry conditions

Material Specification:

  • Fire Proof Sponge - This product is a black flexible polyurethane sponge treated with flame retardants, Particulate filler and a polymeric bonding agent.
  • Density (Kg/m³) 90-100
  • Hardness 130-180
  • Tensile strength (Newton’s) Min 70
  • Elongation at break % Min 90
  • Slab Coat Aqueous polymer system with inert and fire retardant fillers

Test Details:

Test Integrity Insulation
TradaTFEIF 95023 138 Minutes N/A
SGS Yarsley – FT/10330.2 100 Minutes 7 Minutes

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 ConditionsWe 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.

Any Envirograf products to be used in or for Harrods department store should be authorised with our Technical Team prior to purchase.

Product Details
Product 5

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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