Intumescent Strip | Intumescent Strips | Fire

Intumescent Strips

In the Intumescent Strip category, we offer a wide range of products that provide critical fire safety solutions for both residential and commercial applications. These products are designed to expand when exposed to heat, effectively sealing gaps and preventing the spread of fire and, in some instances, smoke.

Intumescent strips are a vital component of modern passive fire protection systems, helping to improve the fire resistance of doors and surrounding structures. Installed within the edges of fire doors, door leaves or surrounding frames, these specialist products are designed to expand when exposed to high temperatures, helping to restrict the spread of fire, smoke and hot gases through a building.

Whether you're fitting new fire-rated doors or upgrading existing installations, our range of intumescent strips provides reliable protection for residential, commercial and public buildings. Manufactured to meet stringent fire safety standards, these products play an essential role in maintaining compartmentation and protecting escape routes during a fire emergency.

Intumescent Fire Only Seals

Our Intumescent Fire Only Seals, available in packs of 5 or 50, are essential for creating fire barriers in key areas. These seals expand significantly in the presence of heat, providing an effective fire-stop solution. Offered by SPARKA UK, these seals are available in various colours, ensuring they fit seamlessly into your design aesthetic.

Types Available:

• Standard Fire Only Seal (Pack of 5): These are the basic versions, suitable for standard fire protection needs.
• Colour Variant Fire Only Seal (Pack of 5): These seals come in different colours, providing an option for aesthetic compatibility while offering the same level of protection.
• Bulk Packs (Pack of 50): Ideal for larger projects or commercial applications, these bulk packs offer value and convenience.

Intumescent Fire & Smoke Seals

The Intumescent Fire & Smoke Seals combine the benefits of fire resistance with smoke sealing capabilities. These are particularly useful in areas where both fire and smoke protection are critical. Available in small packs for minor projects or bulk packs for extensive installations, these seals are versatile for various applications.

Types Available:

• Standard Fire & Smoke Seal (Pack of 5 or 50): These are excellent for environments where both fire and smoke protection are required.
• Colour Variant Fire & Smoke Seal: Offered in different colours to match your design needs without compromising safety.

Speciality Intumescent Products

• Lorient Intumescent Strips: These include fire strips, dual seals, and piles, each serving a specific purpose. The Lorient range offers additional features like different dimensions and colour options, catering to specialised requirements.
• Intumescent Sealants: Products like Fire Mate Sealant and AC95 Acoustic Sealant provide fire resistance and acoustic insulation, ideal for sealing joints and service penetrations.

Pinkgrip Range

While not directly intumescent, the Pinkgrip range, including cartridges and dry fix solutions, complements the installation of intumescent products by providing strong adhesion and easy application.

What Is an Intumescent Strip?

An intumescent strip is a specially engineered material that reacts to heat by expanding significantly in size. When exposed to fire, the strip fills the gaps around a door and its surrounding frame, creating an effective barrier against flames and smoke.

This expansion helps to seal gaps that would otherwise allow fire to spread between rooms or compartments. As a result, intumescent strips are commonly installed alongside certified fire seals to improve the overall fire performance of a door assembly.

Why Are Intumescent Strips Important?

Fire safety regulations require many commercial and residential buildings to incorporate fire-resistant door systems. A correctly installed door intumescent solution helps maintain the integrity of fire doors by protecting vulnerable gaps around the door edge and frames.

The benefits of using quality fire seals and intumescent products include:

• Improved fire compartmentation
• Enhanced protection of escape routes
• Reduced spread of smoke and flames
• Compliance with building regulations
• Increased fire door performance
• Long-lasting and low-maintenance protection

Types of Intumescent Strips

There are several types of intumescent strips available to suit different door configurations and fire ratings.

Rebated Intumescent Strips

A rebated intumescent strip is fitted into a routed groove within the door edge or frame, creating a discreet and professional finish. These products are commonly specified for commercial fire door installations where appearance and performance are equally important.

Combined Fire and Smoke Seals

Many modern products combine an expanding fire seal with brush or blade smoke seals. This provides both fire resistance and day-to-day smoke control, helping to improve building safety.

Surface Mounted Options

Surface-mounted seal intumescent products can be fitted without routing, making them suitable for retrofit projects and upgrades to existing fire door assemblies.

Applications for Intumescent Strips

Our intumescent strips are suitable for a wide variety of applications, including:

• Residential fire doors
• Commercial fire-rated door sets
• Apartment entrance doors
• Office buildings
• Educational facilities
• Healthcare environments
• Hotels and public buildings

They can be installed into door leaves, surrounding frames, and other fire-rated joinery systems where a reliable strip intumescent solution is required.

Choosing the Right Product

When selecting an intumescent product, consider the following:

• Area of Application: Determine if you need protection against fire, smoke, or both.
• Size and Quantity: Assess the scale of your project to choose between individual packs or bulk options.
• Aesthetic Requirements: Consider colour variants if the visual aspect is crucial for your project.
• Special Features: For unique requirements, look into our specialty products like the Lorient range or acoustic sealants.

Shop Quality Intumescent Strips Online

At Build4Less, we supply a comprehensive range of intumescent strips, fire seals and associated fire door products from trusted manufacturers. Whether you require a standard intumescent strip, a specialist rebated intumescent solution or complete fire-rated door seals, you'll find dependable products designed to improve building safety and regulatory compliance.

To complete your fire door installation, explore our range of Internal Fire Doors, Door Handles and Hardware, Door Frames, and Door Closers. These complementary products work alongside intumescent strips and fire seals to create a fully compliant fire door system, helping to improve building safety, fire resistance and long-term performance.

FAQ About Intumescent Strip

What are intumescent strips used for?

Intumescent strips are used in fire doors to help prevent the spread of fire and smoke by expanding when exposed to heat and sealing gaps around the door.

Where are intumescent strips installed?

They are typically fitted into the edge of a fire door or within the surrounding frame to provide effective fire protection.

What is the difference between fire seals and intumescent strips?

A fire seal is a broader term that may include intumescent materials and smoke seals. Intumescent strips specifically expand when exposed to heat to block fire and hot gases.

Can intumescent strips be fitted to existing fire doors?

Yes, many products can be retrofitted to existing fire doors, provided installation follows the manufacturer's guidance and fire certification requirements.