Envirograf Intumescent Wrap

Product 7

We no longer stock this product, but can recommend as our nearest alternatives:

Please contact our Technical Team on 0113 2455450 (option 2) or send a message to [email protected] prior to purchase/use for advice on suitability.



References & Sizes

Wraps with acoustic protection are also available

Ref Internal Pipe Diameter Internal Wrap Dia. External Wrap Dia. Depth(s) Available
EW 18 015mm 018mm 022mm 30/50mm
EW 25 022mm 025mm 029mm 30/50mm
EW 33 025mm 033mm 041mm 30/50mm
EW 40 032mm 040mm 048mm 30/50mm
EW 50 040mm 050mm 058mm 30/50mm
EW 55 050mm 055mm 063mm 30/50mm
EW 60 055mm 060mm 068mm 30/50mm
EW 83 065mm 083mm 095mm 25/30/50mm
EW 90 075mm 090mm 102mm 25/30/50mm
EW115 100mm 115mm 131mm 25/30/50mm
EW135 125mm 135mm 155mm 25/30/50mm
EW150 130mm 150mm 170mm 25/30/50mm
EW165 150mm 165mm 189mm 25/30/50mm
EW215 175 or 200mm 215mm 243mm 25/30/50mm
EW250 225mm 250mm 282mm 50/100mm
EW300 250mm 300mm 340mm 50/100mm
EW350 250mm 350mm 394mm 50/100mm
EW400 350mm 400mm 452mm 50/100mm
EW450 400mm 450mm 506mm 50/100mm
EW500 450mm 500mm 564mm 50/100mm
EW600 500mm 600mm 676mm 50/100mm

Depth Fire Ratings

  • 25mm - Up to 1 hour
  • 30/50mm - Up to 3/4 hours
  • 100mm - Up to 4 hours

Envirograf Intumescent Wrap applies to pipes and cables, crushing PVC and uPVC pipes as they melt in the heat of a fire and filling the gap to prevent the spread of smoke and fire.

Use on copper, aluminium and steel pipes that travel through brickwork and concrete walls, floors and ceilings, absorbing heat and discharging it into the structure and to the other side of a fire block.

The intumescent wrap sits in situ for a lifetime after application without degrading or deteriorating, activating at 130ºc approximately 1-2 minutes into a fire.

1mm of intumescent wrap expands to approx. 25mm when exposed to fire.

A range of sizes are available with optional acoustic protection, and continuous rolls that can be cut for jobs of any size. Use the Envirograf Fire Stopping Kit for filling up openings around existing services.

Material Specification:

The Intumescent wraps are made from Foil clad Intumescent material.

Multigraf Intumescent material chemical constitution

  • Mineral Wool Fibre 20-70% by weight
  • Exfoliating Graphite 20-60% by weight
  • Organic Binder (including adhesive coating) 5.0-30% by weight

Test Details:

Test Integrity Insulation
Fulmer Yarsley – J84201/16 249 Minutes N/A
Trada – FR1746 245 Minutes 245 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 7

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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