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Passive Fire Protection Products

Passive fire protection (PFP) products are essential components in modern building safety, designed to contain fire, limit its spread, and protect lives and property. Unlike active systems like sprinklers or alarms, passive fire protection works silently in the background — built into the structure to maintain fire resistance and compartmentation. From fire-resistant mastics to pipe collars and wraps, these products help buildings meet UK fire safety regulations and give occupants more time to evacuate in the event of a fire.

Kingspan Safire

Kingspan provide a comprehensive range of passive fire protection products including coated batts, cavity barriers, sealants and mastics for fire protection in walls and floors.

Morgan Thermal Ceramics

FastWrap XL is a flexible blanket composed of high temperature fibres classified for applications to 1200°C and fully encapsulated in a durable glass fibre reinforced aluminium foil facing.


FSI Promat

FSi and Promat are divisions of the Etex Group. Established in 1958, Promat are renowned for technical expertise in fire protection, whilst FSi have years of specialist knowledge in fire stopping

Knauf Structural Fire Protection

Highly efficient fireproof insulation together with appropriate fire containment is necessary in order to prevent the spread of flames, heat and smoke.


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What Is Passive Fire Protection?


Passive fire protection refers to materials and systems that are integrated into the fabric of a building to slow the spread of fire and smoke. These systems help maintain the integrity of fire-rated walls, floors, and service penetrations, ensuring that fire stays contained within designated compartments.

PFP products are critical in both new builds and refurbishments, especially in multi-occupancy buildings, commercial premises, and high-risk environments. They are tested to rigorous standards such as BS EN 1366 and BS 476, and are often required to comply with UK Building Regulations Part B.


Types of Passive Fire Protection Products


Choosing the right fire protection product depends on the type of service penetration, substrate, and fire rating required. Here are some of the most widely used solutions:

Fire-Resistant Mastics

Fire mastics are intumescent sealants used to fill gaps around pipes, cables, and joints. When exposed to heat, they expand to seal openings and prevent the passage of fire and smoke. Ideal for sealing linear joints and small penetrations, they offer flexible, paintable finishes and are easy to apply with a standard mastic gun.

Key benefits:

  • Up to 4 hours fire resistance
  • Suitable for use on concrete, plasterboard, and masonry
  • Acoustic and air-sealing properties
  • CE marked and tested to EN standards


Fire Batts (Firestop Boards)

Fire batts are high-density mineral fibre boards coated with intumescent layers. They are used to reinstate fire resistance in walls and floors where services like pipes, ducts, or cables pass through. Batts are cut to size and sealed with fire mastic or ablative coatings to create a robust firestop barrier.

Ideal for:

  • Large or complex service penetrations
  • Multi-service openings in riser shafts or plant rooms
  • Acoustic and thermal insulation alongside fire protection

Intumescent Pipe Collars

Pipe collars are designed to protect plastic pipework that passes through fire-rated walls or floors. In a fire, the collar’s intumescent material expands rapidly, crushing and sealing the softened pipe to prevent fire and smoke from spreading.

Applications include:

  • uPVC, HDPE, and ABS pipe penetrations
  • Soil stacks and waste pipes
  • Horizontal and vertical installations

Fire Wraps

Fire wraps are flexible intumescent strips that wrap around plastic pipes or conduits. They are installed within the wall or floor cavity and expand under heat to seal the void left by melting pipes. Wraps are ideal where space is limited or where collars cannot be surface-mounted.

Features:

  • Lightweight and easy to install
  • Suitable for confined spaces
  • Tested for a wide range of pipe sizes and materials


Why Use Passive Fire Protection?


Passive fire protection is not just a regulatory requirement — it’s a critical part of responsible building design. Here’s why it matters:

Safety

PFP products help contain fire and smoke, giving occupants more time to escape and reducing the risk of injury or death.

Regulatory Compliance

UK Building Regulations Part B and the Fire Safety Act 2021 require adequate firestopping measures in all buildings. Using tested and certified products ensures compliance and peace of mind.

Property Protection

By limiting fire spread, passive systems reduce structural damage and protect valuable assets, helping to lower insurance risk and rebuild costs.

Long-Term Performance

Once installed, passive fire protection requires minimal maintenance and remains effective for the life of the building.


Buy Passive Fire Protection Products UK


At Advanced Insulation Materials Ltd, we supply a full range of passive fire protection products for contractors, specifiers, and facilities managers across the UK. Whether you’re sealing pipe penetrations, reinstating compartmentation, or upgrading fire safety in existing buildings, we have the right solutions.

Our range includes:

  • CE-marked fire mastics and sealants
  • High-performance fire batts and coatings
  • Intumescent pipe collars and wraps
  • Accessories for compliant installation

All products are tested to UK and European standards and supported by expert advice and fast nationwide delivery.


Installation and Maintenance


Correct installation is essential for passive fire protection to perform as intended. Always follow manufacturer guidelines and use compatible accessories. For complex penetrations or high-risk areas, we recommend working with a certified firestopping contractor.

Once installed, PFP systems require minimal maintenance. Periodic inspections should be carried out as part of your fire risk assessment, especially after refurbishment or service changes.


Trusted UK Supplier of Firestopping Products


As a trusted UK supplier, Advanced Insulation Materials Ltd is committed to helping you meet fire safety standards with confidence. We work with leading manufacturers to offer reliable, compliant solutions for every project.


Why choose Advanced Insulation Materials Ltd?


  • Competitive pricing on certified firestopping products
  • Expert support for specification and compliance
  • Fast UK-wide delivery
  • Complementary insulation and acoustic solutions

Whether you’re working on a new build, retrofit, or fire safety upgrade, our team is here to help. Order online today or contact us for tailored advice.



Frequently Asked Questions

What is passive fire protection? +

Passive fire protection refers to materials and systems built into a structure to contain fire, limit its spread, and maintain compartmentation without active intervention.

What do fire mastics do? +

Fire mastics are intumescent sealants used to fill gaps around pipes, cables, and joints. They expand under heat to seal openings and prevent fire and smoke from passing through.

Where are fire batts used? +

Fire batts are used to reinstate fire resistance in walls and floors where multiple services pass through. They are ideal for riser shafts, plant rooms, and large penetrations.

How do pipe collars work? +

Pipe collars contain intumescent material that expands in a fire to crush and seal plastic pipes, preventing fire and smoke from spreading through wall or floor penetrations.

What’s the difference between collars and wraps? +

Collars are surface-mounted around pipes, while wraps are flexible intumescent strips installed within the wall or floor cavity. Both expand under heat to seal pipe openings.

Do passive fire protection products meet UK regulations? +

Yes. Products like mastics, batts, collars, and wraps are tested to BS EN 1366 and BS 476 standards and help meet UK Building Regulations Part B for fire safety.

Can I install firestopping products myself? +

Some products are suitable for DIY use, but for complex penetrations or regulated environments, professional installation is recommended to ensure compliance and performance.