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Waterfront Business Centre 57A
North Woolwich Road London E16 2AA UK
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Ph: +44 (0) 2070550566

Fire Collars & Insulated Fire Sleevs READ MORE

London's leading and independent specialist passive fire protection contractor

SIV Fire Protection is providing expertise in all types of Built-in fire protection and passive fire protection solutions.

Fire collars 

If your walls or floors have cables, pipework and ducts, you’ll need a specialised solution to maintain their integrity. That’s because their fire rating can be reduced in a fire. When they melt, they create gaps through which smoke and fire can travel. Fire collars help seal off this spread.

Fire collars

A fire collar is a fire-resistant fitting that you’ll need when building services have taken place and an area has been penetrated by cables, ducts and pipework. These can reduce the fire rating of the wall or floor, as pipes can melt, leaving a void into adjoining compartments.

Fire collars create an insulating barrier thanks to a retaining ring with an intumescent material that expands under heat. The result is a fire-resistant seal with up to four hours’ fire protection.


  • Up to four hours’ fire resistance
  • Compatible with many plastic pipes
  • Fast installation
  • Cost-effective
  • Water resistant
  • Maintenance free.

Typical applications

Fire collars are typically used to maintain the integrity of plastic pipework that passes through fire-resistant walls and floors.

Fire sleeves


Fire sleeves serve the same purpose as fire collars but need no mechanical fixing. They also have the added benefits of both noise insulation and thermal insulation. We use them in plastic and metal pipework and rectangular vent ducts, conduits and trunking.


Fire sleeves wrap around the pipes. In a fire, they expand to seal the resultant gaps. As plastic pipes melt, they continue to close the gap, offering up to two hours’ fire resistance.




    • Up to two hours’ protection from fire and smoke
    • Acoustic insulation
    • Thermal insulation thanks to reinforced aluminium-foil facing that helps prevent condensation forming


  • Fast installation, so minimal disruption.


Typical applications

We install fire sleeves around metal and plastic pipes. They create a penetration seal that maintains the fire-resistance of walls and floors with gaps cut out for pipes.


Intumescent wraps

Plastic pipes leave gaps in fire-rated walls and floors, through which fire and smoke can pass when they melt. Intumescent pipe wraps offer the same cost-effective solution as fire sleeves but with more flexibility and no size restriction.


The wraps fit most trunking sizes. They wrap around the pipework and we fix them in place with self-adhesive strips. In a fire, the wraps expand to fill the gap left by burnt-out plastic. Giving you up to four hours’ fire protection.




  • Four hours of fire and smoke resistance
  • Fits most sizes of pipe
  • Fast installation with no mechanical fixings
  • Water-resistant, so no problem with hoses and sprinklers
  • Low maintenance – fit and forget.


Typical applications

Intumescent wraps expand to fill the gaps left by melted plastic piping in plasterboard walls, ceiling and floors

Fire Stopping

SIV's Fire Stopping Solutions

Operating nationally from our office in London, we offer our clients a complete integrated Fire Collars & Insulated Fire Sleevs package from pre-tender support right through to installation, commissioning and project handover.

Quality, Innovation and Sustainable

SIV's Passion

SIV Fire Protection are approved installers for a number of market leading system manufacturers working only with reliable suppliers that share our passion for quality, innovation and sustainable business practices.

Business Practice

SIV’s Business Practice

Working to the highest possible SHEQ standards, SIV’s business practice is defined by its unwavering passion for its clients and its critical, insider knowledge in every aspect of the field.

Working Environment

SIV Company Values

It is our firm belief that adherence and demonstration of our Company Values will build up a more positive and efficient working environment and benefit our clients, key suppliers and all those who interact with the Company

SIV Fire Protection

Awards &

In The Field Of Exceptional Innovative Marketing…SIV Sets New Standards and Stands Apart


Want to know more about us?

Ph: +44 (0) 2070550566


Waterfront Business Centre
57A North Woolwich Road
London E16 2AA

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