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.

    IntusleeveDiameter (mm's)Length (mm's)Colour

    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.

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    Nullifire Intusleeve is only available with the shipping and delivery timescales listed below - please do not contact our Customer Support Team with enquiries about alternative or earlier shipping and delivery times.

    Saturdays and Sundays, as well as Bank Holidays, are not classed as working days.

    Orders placed after the cut-off for this product will not be processed for earliest dispatch until 9am the next working day.

    All delivery costs below are excluding VAT

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