Merry Christmas from all at CJ Paint Spraying. Our office hours will be closed from Thursday 21st December till Monday 8th January

Intumescent Coatings

High rise buildings and outdated materials are susceptible to fire damage and can quickly burn out of control. We offer tried and tested intumescent coatings and intumescent fireproof cladding spraying to ensure modern buildings remain safe and meet the necessary health and safety requirements.


The need for intumescent fireproofing is currently being well documented in the UK. The unforgettable events that occurred at the Grenfell Tower Block in 2017 have proven that fire retardant coatings are a crucial addition to the makeup of a building. CJ Paint Spraying has an established team of on site spraying and cladding panel contractors that specialise in intumescent coatings and intumescent fireproofing.

The fire retardant coatings are designed to withstand more heat and significantly reduce the speed at which the flames are able to spread in the event of a fire. Outdated cladding sheets are highly combustible and require the correct fire retardant coating to ensure events such as the Grenfell Tower fire in 2017 are not a regular occurrence.

If you’d like to find out more about the intumescent coatings we offer, call us on 0800 002 9230, and speak to a member of our expert, friendly team, today!

Fire Protection Intumescent Coating Services in London, Manchester, Liverpool, Birmingham, and Portsmouth

We provide comprehensive intumescent coating services throughout the UK, ensuring exceptional fire protection for building structures. Our services, available on-site or off-site, safeguard steel, timber, and cement supports, offering fire resistance for up to 240 minutes.

Intumescent coatings serve as a thermal shield for structural elements, mitigating heat damage during a fire and helping buildings comply with the latest regulations.

CJ Paint Spraying is a trusted nationwide provider, operating from our hubs in London, Manchester, Liverpool, Birmingham, and Portsmouth.

These advanced coatings can expand up to 100 times their original thickness when exposed to high temperatures, providing robust fire protection. They can be applied to structural steel, timber, and concrete, both on-site and off-site, delivering protection durations of 30, 60, 120, 180, and 240 minutes based on specific fire safety requirements.

We offer a range of intumescent coatings to suit different needs:

  • Water-based Intumescent Coatings: These are eco-friendly with minimal odour, making them a cost-effective choice. However, they are less tolerant to humidity and may take longer to dry in such conditions.
  • Solvent-based Intumescent Coatings: Ideal for semi-exposed environments, these coatings are versatile, drying faster and providing a smoother finish compared to water-based options.
  • Epoxy-based Intumescent Coatings: Designed for extreme environments such as offshore and petrochemical industries, these coatings are highly resistant to corrosion and form a durable, thick protective layer.

Our expertise ensures your structures receive the highest level of fire protection, tailored to meet your specific needs.


Why Our On Site Coatings?

Contact Us for a FREE Survey


“We have used CJ Paint Spraying a couple of times for on site spraying services along with repairs to our external cladding. All of the work they have completed for us has been spot on! It always looks brand new, and the teams are friendly and professional, we couldn't recommend enough.”

David Netherway 14th March 2018

Common Questions About Intumescent Coatings

What is intumescent coating?

An intumescent coating is a passive fire protection measure applied to structural elements such as steel, timber, and concrete. When exposed to high temperatures, typically during a fire, the coating undergoes a chemical reaction causing it to expand significantly, forming a charred layer that insulates the substrate from the heat. This expansion slows the temperature rise of the structural elements, maintaining their integrity for a specified period, which can be critical in allowing safe evacuation and providing more time for fire services to respond.

Where can intumescent coatings be applied? 

Intumescent coatings are highly versatile and can be applied to various structural elements, including steel beams, columns, timber frames, and concrete supports. They can be applied both on-site and off-site, depending on the specific requirements of the project. On-site application is often preferred for large structures or retrofitting, while off-site application is suitable for prefabricated elements. The flexibility in application makes intumescent coatings an ideal solution for both new constructions and existing buildings needing fire protection upgrades.

How long does intumescent coating last? 

The fire protection offered by intumescent coatings can last up to 240 minutes, depending on the type and thickness of the coating applied. The exact duration of protection is determined by the specific product used and the level of fire resistance required by building codes or the client’s specifications. Regular maintenance and inspections are essential to ensure the coating remains effective over time. Additionally, environmental factors and the condition of the underlying substrate can influence the longevity and performance of the coating.

What are the different types of intumescent coatings? 

There are three main types of intumescent coatings: water-based, solvent-based, and epoxy-based.

  • Water-based coatings are environmentally friendly, with low odour and VOC emissions, making them suitable for indoor applications and areas with stringent environmental regulations. However, they are sensitive to humidity and take longer to cure in damp conditions.
  • Solvent-based coatings offer greater durability and faster drying times, making them ideal for semi-exposed environments where weather and temperature variations occur. They provide a smoother finish and are more resilient to humidity compared to water-based coatings.
  • Epoxy-based coatings are designed for harsh and demanding environments, such as offshore and petrochemical industries. They form a very thick, corrosion-resistant layer that provides exceptional protection in extreme conditions. These coatings are typically more expensive but offer superior performance in challenging environments.

Are intumescent coatings environmentally friendly? 

Water-based intumescent coatings are considered the most environmentally friendly option due to their low levels of volatile organic compounds (VOCs) and minimal odour. They are designed to have a reduced environmental impact, making them suitable for use in residential, commercial, and institutional buildings. While solvent-based and epoxy-based coatings offer different benefits, they generally have higher VOC levels and environmental impacts.

Choosing the right type of coating involves balancing environmental considerations with performance requirements, and our experts can help guide this decision based on the specific needs of your project.

How do I choose the right intumescent coating for my project? 

Selecting the appropriate intumescent coating depends on several factors, including the type of structural material, the environmental conditions, the required fire resistance duration, and budget considerations.

  • For indoor applications with minimal exposure to humidity, water-based coatings may be the best choice due to their environmental benefits and cost-effectiveness.
  • In semi-exposed environments where faster drying times and smoother finishes are needed, solvent-based coatings are more suitable.
  • For projects in harsh environments, such as marine or petrochemical settings, epoxy-based coatings provide superior durability and resistance to corrosion. Consulting with a fire protection specialist can ensure that the chosen intumescent coating meets all safety standards and performance criteria for your specific application.