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Intumescent Paint for Steel
Intumescent paints for steel, structural steel and cast iron are available with 30, 60, 90 and 120-minute fire protection, to accompany fire retardant paints for other surfaces. The intumescent coating products listed on this page are available for fireproofing interior and exterior surfaces and building structures, and come in a full range of colours. Listed products are not suitable for general heat protection of metals. Click here for more info.
Bollom Brosteel Ultra 60
A new and improved revolutionary thin-film waterborne white intumescent paint for standard, interior structural steel members, providing 30 minutes fire protection in only one coat and 60 minutes in two coats - see below for details. For internal use only Water-based - quick drying thin-film intumescent coating Certificate of Conformance...
Thermoguard Thermocoat WI Ultimate
Interior use, water-based intumescent paint system, providing up to 90 mins fire resistance to structural steel and cast iron with a minimum number of coats. Optimised for Universal Beams, Columns and other open section steel: See Thermoguard Thermocoat WO Ultimate for steel hollow sections: For protection to exterior environment...
Zeroflame Aquasteel WB+
White thin-film waterbourne intumescent coating with new and improved formula to provide 30 and 60 minutes fire resistance on standard structural steel members in internal environments. It provides an easier and more efficient alternative to cladding steel members in plasterboard. New improved formula Achieves both 1/2 hour and 1 hour fire...
Nullifire SC802 On-Site Water-Based Intumescent Basecoat
A water-based, white, thin film intumescent coating for the protection of internal structural steelwork. Nullifire SC802 can provide up to 60 minutes fire resistance. Includes Optifire+ technology - reliable and traceable fire protection Please Note: We strongly recommend Tricomb Plastic Wet Film Gauges are used to help ensure correct...
Thermoguard Thermocoat WO Ultimate
Water-based intumescent paint system providing fire resistance to structural steel and cast iron with a minimum number of coats. A compatible decorative overcoat system ensures the system will enhance the building’s architectural and design features. Optimised for CHS, SHS and RHS hollow sections See Thermoguard Thermocoat WI Ultimate...
Jotun Steelmaster 600WF
Specially designed as passive fire protection for steel constructions. Designed to protect up to 60 minutes on a wide range of I section beams and columns. Will provide 90 minutes fire duration as per BS476 part 20-21. Suitable for structural steel exposed to internal environments up to corrosivity category C3 (ISO 12944 -2). Please Note: We...
Thermoguard Thermocoat S
Intumescent, solvent based paint for structural steel and cast iron. Provides up to 90 minutes fire resistance, maintaining the structural integrity of buildings. For protection to exterior environment steels For interior Universal Beams, Columns and other open section steel see Thermoguard Thermocoat WI Ultimate For interior steel...
Sherwin-Williams Firetex FX1003
Single pack, thin film intumescent coating, designed for site application by airless spray, to provide fire resistance for up to 120 minutes on structural steel. Certificate Application
Sherwin-Williams Firetex FX5062
Water-based one-pack TCEP free thin film intumescent coating, specifically designed for airless spray application to provide fire resistance for periods up to 90 mins on structural steel. Firetex FX5062 has been Certifire Approved. Note: application schedule required before using - click to see more information below. Certificate Application...
Nullifire SC804 On-Site Water-Based Intumescent Basecoat
A water based intumescent coating used for internal structural steel to C1 and C2 environments that can be top coated with a suitable topcoat for decorative and durability purposes. Includes Optifire+ technology - reliable and traceable fire protection Developed to give optimised loadings for up to 90 minutes Up to 120 minutes fire...
Nullifire SC801 On-Site Water-Based Intumescent Basecoat
Nullifire SC801 On-Site Water-Based Intumescent Basecoat is a water-based, white, thin film intumescent coating for the protection of internal structural steelwork, providing up to 120 minutes fire resistance. Please Note: We strongly recommend Tricomb Plastic Wet Film Gauges are used to help ensure correct film thicknesses are achieved...
Jotun Steelmaster 1200WF
One component waterborne acrylic thin film intumescent coating independently tested and approved for fire protection of structural steel exposed to cellulosic fire up to 180 minutes. Suitable for properly prepared carbon steel substrates. Please Note: We strongly recommend Tricomb Plastic Wet Film Gauges are used to help ensure correct film...
Bollom Brosteel Ultra 60 - 30min System for Universal Beams & Columns
A pack with 4,400+ matt and eggshell colours with sufficient intumescent basecoat (Bollom Brosteel Ultra 60) and coloured topcoat (Bollom Flameguard Ultra Vinyl Matt, Bollom Flameguard Ultra Acrylic Eggshell) to protect suitably primed, standard ‘ɪ’ shape structural steel beams and columns in internal environments to 30 minute fire resistance....
Zeroflame Aquasteel WB+ 30min System for Universal Beams & Columns
A pack with 4,400+ colours that provides sufficient intumescent basecoat (Zeroflame Aquasteel WB+) and coloured topcoat (Zeroflame Aquasteel WB+ Finish) to protect suitably primed, standard ‘ɪ’ shape structural steel beams and columns in internal environments to 30 minute fire resistance. Achieves 1/2 hour (30 mins) fire resistance on...
Sherwin-Williams Firetex FX5090
Water based TCEP free thin film intumescent coating, designed for application by airless spray to provide fire resistance for periods of up to 120 minutes on structural steel. Certificate Application
Bollom Brosteel Ultra 60 - 60min System for Universal Beams & Columns
Fire protection pack with 4,400+ matt and eggshell colours that provides sufficient intumescent basecoat (Bollom Brosteel Ultra 60) and coloured topcoat (Bollom Flameguard Ultra Vinyl Matt, Bollom Flameguard Ultra Acrylic Eggshell) to protect suitably primed, standard ‘ɪ’ shape structural steel beams and columns in internal environments to 60...
Thermoguard Thermocoat WI 30min System for Universal Beams & Columns
30min system pack for universal beams and columns provides sufficient intumescent basecoat (Thermoguard Thermocoat WI) and coloured topcoat (Thermoguard Flame Retardant Topcoat) to protect suitably primed, standard ‘ɪ’ shape structural steel beams and columns in internal environments to 30 minute fire resistance. Achieves 1/2 hour (30 mins)...
Thermoguard Thermocoat WI 60min System for Universal Beams & Columns
60min system pack for universal beams and columns is a pack that provides sufficient intumescent basecoat (Thermoguard Thermocoat WI) and coloured topcoat (Thermoguard Flame Retardant Topcoat) to protect suitably primed, standard ‘ɪ’ shape structural steel beams and columns in internal environments to 60 minute fire resistance. Achieves 1...
Zeroflame Aquasteel WB+ 60min System for Universal Beams & Columns
A pack with 4,400+ colours that provides sufficient intumescent basecoat (Zeroflame Aquasteel WB+) and coloured topcoat (Zeroflame Aquasteeel WB+ Finish) to protect suitably primed, standard ‘ɪ’ shape structural steel beams and columns in internal environments to 60 minute fire resistance. Achieves 1 hour (60 mins) fire resistance on...
Jotun Steelmaster 60SB
One component solvent based acrylic thin film intumescent coating independently approved for fire protection of structural steel exposed to cellulosic fire. It can be used as a mid coat or finish coat in atmospheric environments and is suitable on approved primers on carbon steel and galvanised steel substrates. Specially designed as a...
Sherwin-Williams FIRETEX FX9500
2-pack exterior durable intumescent offering 60, 90 and 120 minute fire protection both internally and externally without topcoat, which can be applied directly onto blast cleaned steel. Suitable for application in-shop and on site. Ultra durable - suitable for use in a C5-I environment, as defined in ISO 12944-2:1998 with appropriate...
Nullifire SC601 On Site & Off-Site Intumescent Base Coat
Single pack acrylic thin film intumescent basecoat for fire protection of internal & semi-exposed structural steelwork up to 60 minutes. This product is optimised to provide 60 minutes fire resistance to ‘I’ section beams and columns, hollow columns and beams, as well as cellular beams, concrete filled hollows and solid steel rods....
Bollom Brosteel Ultra 60 - 30min System for Hollow Sections
4,400+ matt and eggshell colours that provides sufficient intumescent basecoat (Bollom Brosteel Ultra 60) & coloured topcoat (Bollom Flameguard Ultra Vinyl Matt, Bollom Flameguard Ultra Acrylic Eggshell) to protect suitably primed, standard Square, Rectangular & Circular hollow section steel in internal environments to 30 minute fire...
Protecta Steel Paint FR-1
Single component acrylic paint used for up to 60 minutes fire protection of loadbearing structural steel that normally requires no top coat, is easy to use and very easy to clean up. Fire resistance approval - tested according to BS-EN 13381-8:2013 Available in 28 fire tested decorative shades, including white Non-toxic, emission free...
Sherwin-Williams Firetex M72
Solvent based intumescent mastic coating, used for the repair of small areas of mechanical damage to Firetex range of intumescent coatings. Certificate Application
Zeroflame Aquasteel WB+ 30min System for Hollow Sections
A pack with 4,400+ colours that provides sufficient intumescent basecoat (Zeroflame Aquasteel WB+) and coloured topcoat (Zeroflame Aquasteel WB+ Finish) to protect suitably primed, standard Square, Rectangular and Circular steel hollow sections in internal environments to 30 minute fire resistance. Tested to British Standard - BS476 Part 21...
Bollom Brosteel Ultra 60 - 60min System for Hollow Sections
Fire Protection pack with 4,400+ matt and eggshell colours that provides sufficient intumescent basecoat (Bollom Brosteel Ultra 60) and coloured topcoat (Bollom Flameguard Ultra Vinyl Matt, Bollom Flameguard Ultra Acrylic Eggshell) to protect suitably primed, standard Square, Rectangular and Circular steel hollow sections in internal...
Jotun Steelmaster 120SB
Jotun Steelmaster 120SB is a one component solvent based acrylic thin film intumescent coating independently approved for fire protection of structural steel exposed to celulosic fire up to 120 minutes. It can be used as mid coat or finish coat in atmospheric environments and is suitable on approved primers on carbon steel and galvanised steel...
Zeroflame Aquasteel WB+ 60min System for Hollow Sections
A pack with 4,400+ colours that provides sufficient intumescent basecoat (Zeroflame Aquasteel WB+) and coloured topcoat (Zeroflame Aquasteeel WB+ Finish) to protect suitably primed, standard Square, Rectangular and Circular steel hollow sections in internal environments to 60 minute fire resistance. Tested to British Standard - BS476 Part...
Hempel Hempafire Pro 315 Fast Dry 43361
Hempafire Pro 315 Fast Dry 43361 is a one component, solvent-borne, intumescent coating, optimised for 60 minutes for protection of structural steel against cellulosic fires, suitable for in-shop and onsite applications. Use as passive fire protection for structural steel in interior and exterior conditions (Up to C4 conditions ISO...
Sherwin-Williams Firetex FX2003
Sherwin-Williams Firetex FX2003 is single pack thin film intumescent coating, designed for in-shop application by airless spray to provide fire resistance for up to 120 minutes on structural steel. Certificate Application
International Interchar 2060
International Interchar 2060 is a single component, solvent borne, borate free, high solids, low VOC, thin film intumescent coating optimized for 60 minutes fire resistance to structural steelwork. Independently tested at accredited laboratories to BS476 Parts 20-21, AS 1530.4-2005 and AS 4100, and third party assessed and certified....
PPG SteelGuard 651
A one-component, thin-film, waterborne intumescent coating for fire protection of structural steelwork. Provides up to 120 minutes protection from cellulosic fires. Suitable for C1, C2 and C3 internal environments (ISO 12944) For dry internal (C1) environments no topcoat is required Tested and assessed to EN13381-8, BS476-20/21 and...
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Important fire test standards when using intumescent coatings on structural steel constructions are European Union: EN 13381-8 (Replaces national Standards in Europe) and United Kingdom: BS 476-20/21 (Commonly referred to in EU, Middle and Far East).
Quick Links - Click To Jump To Section:
- What Is an Intumescent and How Does Intumescent Paint Work?
- Unprotected Steel
- Thick and Thin Film Intumescent Coatings
- Intumescent Topcoats - For Painting Over Intumescent Paints
- Water-Based Intumescent Coatings
- Solvent Based Intumescent Coatings
- Zeroflame, Jotun, Nullifire, Thermoguard, Bollom and More
- Customer Service
- FAQs: Ensuring You Get the Correct Specification and Level of Fire Protection You Need
- How to Get A Quote or Full Calculation/Specification to Meet Building Regulations
- Certificates
- Our Help and Advice Promise
What Is an Intumescent and How Does Intumescent Paint Work?
Intumescent coatings are passive fire protection measures which swell up when heated (in a fire for example) and protect the material (steel, plasterboard or wood ) underneath it, from fire. As the intumescent layer swells up, it increases its surface volume, which then helps to decrease the intensity of the flames. The top coating produces a light char as it is burnt, which makes it a poor conductor of heat and fire spread.
Application of intumescent paint layers helps fireproof structural steel, steel beams, steelwork or cast iron and can be used externally or internally, on small or larger areas. Intumescent coatings are generally available as water-based or solvent based variations (more information below).
Under the intense pressure and heat from a fire, most intumescents work by producing a foam-like substance, from the chemicals in it reacting and releasing a vapour. Upon carbonisation, the foam will solidify to a black material (a char), which insulates and protects the integrity of the steel, cast iron, or wood surface. As the intumescent paint expands (sometimes between 50x and 100x the original coating’s thickness) in the event of a fire, protecting the surface from heat, the surface is not burning, but simply undergoing a catalytic chemical reaction.
Intumescent paints and coatings are generally used in architecture and in the building of structural steel or timber members. They can provide a decorative and aesthetically pleasing finish on previously exposed steel, as well as keeping the material below its critical temperature to maintain its integrity in the outbreak of a fire or heat explosion. Intumescent coatings can be thinner than technically sprayed fireproofing methods.
Unprotected steelwork can reach temperatures of 550°C in a fire, where it then can lose its load bearing capacity and collapse. Building regulations and legislation demand fire protection to upgrade the fire resistance of buildings.
Intumescent paint and coatings can be applied by brush, roller or spray, and are generally white or clear (timber only). Up to 60 minutes of fire protection can be obtained for timber and dependant on the thickness of the steel, up to 120mins protection can be achieved from applying an intumescent paint system.
Thick and Thin Film Intumescent Coatings
Intumescent paint is applied in a series of coatings which build up to the thickness required to correspond with the level of protection mandated by the building code. Each product available at Rawlins Paints comes with an in-depth datasheet, outlining application methods, drying time and layer specifications before the top, pigmented to colour, layer is applied.
Thin film intumescent coatings usually require a primer to be applied to the steel first and sealer topcoat to finish the system to offer between 30 and 90-minutes fire resistance. 120 fire resisting intumescent coatings are available with some manufacturers stocked at Rawlins Paints.
Thick film intumescent coatings are frequently epoxy based. They have a higher dry film thickness and were originally developed for use with hydrocarbon fires. Thick films do not expand as much as thin films in the event of a fire. Thick film intumescent coatings may be used on external steel in high rise buildings, office towers and exposed marine/oil refinery environments.
Both can be applied off-site, but this is a specialised task as damage to steel or cast-iron members is possible in transit and erection.
Intumescent Topcoats - For Painting Over Intumescent Paints
The topcoat, or final layer, of an intumescent paint system is tinted to produce the chosen colour and finish, and protects the intumescent basecoat below it. The topcoat / top-seal should always be compatible with the applied basecoat – please contact Rawlins Paints for further information about product compatibility.
Water-Based Intumescent Coatings
Thermoguard Thermocoat is a low odour, water based intumescent system, which can provide up-to 90 minutes of fire resistance on structural steel or cast iron – this is dependent on the DFT (Dry Film Thickness) the coating is applied at. A (compatible) decorative overcoat can be applied to match the décor and or architectural design features.
Thermoguard issue a Certificate of Supply on request for each specified project for insurance, Fire and Building Control Authority and Client Records.
Water-based intumescent paints give a smoother finish in a faster timeframe than solvent based coatings.
Solvent Based Intumescent Coatings
Jotun produce a range of solvent based intumescent coatings for exposed structural steel in areas of high corrosiveness – such as offshore builds, and atmospheric or marine environments.
These intumescent coatings also offer fire resistance to structural steel exposed to cellulosic fire.
Zeroflame, Jotun, Nullifire, Thermoguard, Bollom and More
Fire retardant paint for steel and paint for cast iron manufacturers supplied by rawlinspaints.com include Bollom Fireshield and Brosteel Ultra 60, International, Jotun Steelmaster, and Thermoguard Thermocoat.
The fire resistance time and application method of intumescent paints available from these manufacturers can be filtered by the sub-category buttons:
- 30, 60, 90, or 120 Mins Fire Resistance
- Internal Use
- On-Site Application
- Water-Based Coatings
- Solvent Based Coatings
- Epoxy Based Coatings
- Off-Site Application
- Solvent Based Coatings
- Epoxy Based Coatings
- Methacrylate Based Coatings
- External Use
- On-Site Application
- Water-Based Coatings (not available for 120 mins fire resistance)
- Solvent Based Coatings
- Epoxy Based Coatings
- Off-Site Application
- Solvent Based Coatings
- Epoxy Based Coatings
- Methacrylate Based Coatings
Applying flame retardant paint to steelwork can be easy and we can help you ensure you achieve the protection you require and guarantee yourself a fire certificate. The more information you give us about the steel you must protect, the more accurate we can be with our specification saving you money. We prefer to speak to our customers prior to them purchasing these intumescent paints to make sure you're getting the right product and are confident of how to use it correctly.
FAQs: Ensuring You Get the Correct Specification and Level of Fire Protection You Need
Intumescent paints and coatings can sometimes be referred to as fire retardant or fire-resistant paints for steel – and sometimes (incorrectly) as heat resistant paints. Below, Rawlins Paints break down the essential elements of buying Intumescent Paint for steel:
How to Get A Quote or Full Calculation/Specification to Meet Building Regulations
Simply call us (mobile users can click on this number 0113 245 5450) and let us know:
- Level of fire protection required (i.e. 30, 60, 90min, etc.)
- Each steel section dimension (i.e. 254x146x37 UB)
- Quantity and length of each section (or overall meterage for each section)
- Orientation (horizontal or vertical)
- Number of sides to be painted (all sides, 3 sides, 1 flange, etc.)
- Environment (internal, external, car park, chemical exposure, etc.)
- Application on site or in shop
Alternatively you can just forward us drawings (email [email protected]), fabrication/cutting lists and we'll extract the information from them but in that instance we'd need some guidance as to what to allow for i.e. all steels on first floor, etc.
We will then generate a full report including specification and mark-ups (where relevant) providing you the most cost effective solution available for your project, which includes:
- Cost (including trade discount)
- Typical coverage rates
- Product application instructions
- Product storage instructions
- On/off-site product transportation recommendations
- ETA on product delivery – and whether next day delivery options are available with your purchase
- Product and full system recommendations or requirements
- Surface and substrate preparation advice
- Including usage for new steel, and painting over/preparing previously decorated surfaces
- What coating finishes may be available for improved decorative and aesthetical value
- Drying times and times between coating layers
All of the intumescent paints we offer have been tested to varying British/European standards by recognised independent third parties depending on their required use and performance. In addition to these industry standard tests, some products also offer additional paperwork after use by way of a ‘certificate’ that can be obtained in different ways - manufacturer dependent. Some require a form to be completed and returned by email, others have online application forms, others can be simply called to provide project details verbally. Not ALL products offer this additional supplement and if this type of certificate is important to your project you should contact our Technical Team on 0113 2455450 (option 2) or [email protected] to advise them of this so they can ensure they recommend a suitable product accordingly. Certain larger projects may also require the involvement of an independent inspector, again you should contact our Technical Department to discuss this if required.
Fire protection doesn’t have to be hard work, let our technical staff help you get the level of protection you require and the finish you want. Whether it’s structural steel in a warehouse, fire retardant paint for wood on a new-build, or the internal walls of a block of flats, we can provide a full specification and offer guidance throughout the project.