Nullifire Intusleeve


We no longer stock this product, but can recommend Protecta FR Pipe Wrap as a great alternative.

Product not available
This Product has been Discontinued


Size References

The length of the sleeve is relative to the width of the wall and should be specified when placing an order.

Intusleeve Diameter (mm's) Length (mm's) Colour
40 140 Red
55 140
55 300
63 140
63 300
82 140
82 300
110 140
110 300
125 140
160 140
160 300
200 180
200 300

Firetherm Intusleeve, an intumescent steel sleeve for combustible pipes, providing up to 4 hours fire resistance for pipes passing through fire-rated walls and floors, and cavities in stud work walls.

The ultra-slim design of the Firetherm Intusleeve makes installation in tight or awkward areas and situations easier and less obtrusive than externally fitted fire collars, and are a great solution for angled pipes.

In a fire, the intumescent lining within the metal sleeve expands and crushes the heat softened plastic pipe, leaving a potential path for fire completely sealed.

Typical Configuration Types

  • Combustible pipes
  • Insulation types:
    • Rock fibre
    • Glass fibre
    • Phenolic
    • Nitrile rubbers

Tested In floors and walls, including lightweight partitions, and may also be used within Firetherm Intubatt 1 and 2.


  1. Pull open Intusleeve and fit around the pipe.
  2. Push Intusleeve through the compartment wall, ensuring equal overhang to each side.
  3. Close Intusleeve.
  4. Seal in place using Firetherm Intumastic or ADL sealant in gaps up to 20 mm. Larger openings may be sealed with Firetherm Intubatt.
  5. Annular spaces up to 60 mm may be packed using a minimum 60 mm depth 64 kg rock fibre.

The length of the sleeve is relative to the width of the wall and should be specified when placing an order.


Building Regulations 2000 Approved Document B states that all plastic pipes over 40 mm should be provided with a proprietary sealing system which has been shown by tests to maintain the fire resistance of the wall, floor or cavity barrier. Firetherm Intusleeve complies with these requirements.

Fire Testing

Fully tested at Exova BM TRADA to 2 hours integrity and insulation walls. 4 hours integrity and insulation when used within Intucompound floor seals.

Tested at Exova BM Trada to BS EN 1366-3 and BS 476 Pt 20-22

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

Data sheet


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.

Be the first to ask a question about this product!

Question about the product

* Required fields
You might also like

Nullifire Accessories For Fire Protection

An extensive range of accessories and ancillary products for use with Nullifire (Firetherm) systems, helping the installation and application of firestopping products. Refer below to see the full range. 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...

Price £20.80
In Stock and Available for Delivery