Firewall paint for metal structures – features of compositions

Firewall paint is essential for preventing metal buildings from catching fire. By providing a layer of defense, this specialized paint helps to contain the spread of flames and buys critical time for emergency response and evacuation. It’s crucial for guaranteeing the longevity and safety of infrastructure and buildings.

Regular paint is not suitable for use as firewall paint on metal structures. Its distinctive compositions are designed to resist high temperatures and keep the metal from deteriorating in extreme heat. This makes it an essential component of fire safety plans, particularly in public areas, commercial buildings, and industrial settings.

Making educated decisions regarding the application of firewall paint can be facilitated by being aware of its features. These paints are available in different varieties, each with unique qualities appropriate for various conditions and demands. You can improve the overall building safety and fire resistance of your metal structures by selecting the appropriate firewall paint.

This post will examine the essential features of firewall paint for metal buildings, going over what makes these mixtures efficient and how to apply them to optimize fire safety. Whether you’re a contractor, building owner, or just interested in fire safety, this information will give you useful insights into a crucial area of building and upkeep.

What metal structures are subject to fire protection

Fasteners, open surfaces, surfaces with structural functions, connecting nodes, supporting parts, and support elements need to be shielded from flames. Metal serves as a fire barrier for all kinds of construction materials. Details that don’t relate to a building’s structural components, however, are exempt from this requirement. Additionally, provided that the item does not fall under the category of structures that pose a fire hazard.

Features of the compositions used for fire protection

For metal structures, the manufactured fireproof composition should match:

  • Fire safety standards;
  • Duration of the life (15-20 years);
  • Environmental requirements;
  • Vibration resistance;
  • Aesthetic appearance.

Fire safety regulations must be followed when creating fireproof composition for metal buildings.


Metal is protected against fire in a variety of methods. In the first instance, metal buildings are covered in a unique substance that protects them from fire. The structure of the building with a unique solution is another method of fire protection. Metal structure firewalls are the third technique. Even though every technique works, painting metal structures with fire-retaining compounds is the least time-consuming.

Why is the processing so important

Since the mechanical strengths of aluminum and zinc decrease with increasing temperature (to 400 °C and 30 °C, respectively), the strength of each metal alloy varies. As a result, steel loses strength when heated to 400 °C.

Since any structure’s base is made of metal and is subject to loads, a high-quality deterioration of the material’s properties brought on by heating can result in deformation or even the structural collapse of the entire thing. Paint that is fireproof is therefore required on metal buildings.

How does the fire -retardant coating of metal structures work

The paint used to prevent fires in metal buildings won’t react with the outside world because the product is operating as intended. The coloring composition breaks down when the metal is heated, creating an outer layer of coke that protects the metal from high temperatures while preserving its qualities.

It breaks down later, releasing gas and water that limit the burning. Furthermore, the coke film is only strengthened, improving defense.

The coloring material breaks down when the metal is heated, creating an outer layer of coke that shields the metal from extreme heat.

Steel and other metals are shielded from heat and fire by a specialized coating called firewall paint for metal buildings. When exposed to high temperatures, this paint creates an insulating layer that delays the heating process and extends the firefighting window. Its capacity to spread and produce a thick layer of char, strengthening the metal’s resistance to fire, is one of its important characteristics. In order to ensure safety and structural integrity during a fire, this protective feature is essential for buildings and structures. Selecting the appropriate product for particular requirements can be made easier by being aware of the features and composition of firewall paint.

Types and types

There are currently two varieties of paintwork products that are fire-resistant. Paint classified as fireproof:

    The swollen composition. During interaction with open fire or a high temperature caused by fire, the paint increases in volume, forming a foamed mass of a charred coke layer. The chemical composition of the paint does not allow the metal surface to warm up;

Characterization of fire -retardant coloring mixtures

Under normal circumstances, the fire is inert; however, the structure’s heating causes the coating to break down, and a layer of coke surrounds the metal, maintaining its temperature and protecting the structure. Gas and water are released during the decomposition, which lessens the intensity of the fire. In addition, the coke layer is reinforced to ensure that the overall design is maintained.

Different types of fire compositions have unique properties. Thus, the superfluous product creates a solid but thin thermal insulation film. It is rare to use this kind of paint because, despite its strength, the protection burns easily.

It is worthwhile to give preference to paint that contains potassium silicate if you decide to use a pestless method because paint that contains sodium silicate compounds will cause white stains when they react with water.

Because accumulating compositions have additional characteristics, when they get heated, their number multiplies by 70, increasing the heat-insulating layer’s thickness. This enables you to prevent metal from losing strength even after heating it for longer than 1.5 hours.

Composition and description

In accordance with GOST R. 53295-2009 and the regulated NPB 236-97 The maximum flame resistance of each of the seven groups of paints varies from 15 to 90 minutes for three groups and up to 150 minutes for one group.

The documents that go with the product contain information about the chemical makeup of the fire-resistant material during production. However, due to the manufacturer’s commercial secret, these data are typically not available to the general public. The only information available from open sources is that they contain elements that form films and become fenced when heated. Additionally, reagents like chopped mineral fillers, thermally active graphite, and distinct types of salts are included in their chemical composition.

The only information available from open sources is that they contain elements that form films and become fenced when heated.

Certificate of conformity

An official fire safety certificate attesting to the quality of fireproof products bears the following information:

  • Brand and name of paint;
  • Which group of fire -retardant means belongs;
  • A variety, name, quantity, required thickness of the layers of primer and finish solutions, protective equipment and decorative compositions that can be combined with these products;
  • Coating thickness, paint consumption, effectiveness of protective properties.

Requirements for fire retardant colors

Essential specifications for coatings that resist fire:

  • The duration of operation, resistance to aggressive environment, including high humidity, vibration. The paint should not crack;
  • Lack of toxicity;
  • Attractive appearance of the coating, including the possibility of giving a paint any color.

These specifications enable experts to choose the best options.

Application rules

Materials for fire varnish are applied in phases. Their flame resistance has an impact on the number of layers, as the manufacturer notes in product documentation. There is also an indication of the material consumption.

The last coat of paint should always be fully dry before beginning any further processing. High adhesion can only be attained by degreasing the metal’s surface.

Priming is essential because it keeps the metal structure from corroding and enhances paint adhesion to the surface without causing separation or cracking. Nonetheless, the primer and fire retardant should work well together.

Protective equipment can be used to paint metal structures manually with brushes and rollers or with production equipment that uses spraying or spraying stations.

It is possible to tint fire-retractable coloring compounds. As long as the varnish comes from a single manufacturer and is as compatible as possible, using it as a finish coating is acceptable.

The last coat of paint should always be fully dry before beginning any further processing.

Phased technology for applying to the surface

Sequence of cars:

  1. The surface cleaning of rust is carried out with brushes with a hard pile or a grinder. The shavings are scheduled.
  2. The base is primed by a special anti -corrosion agent compatible with fire resistance paint.
  3. The coloring composition is stirred by a construction mixer or manually. Staining is carried out on a well -dried primer.

The fireproof composition layer should be between one and two millimeters thick. If it is thinner, the layer may break and swell unevenly.

The metal structure is ready for operation after it has dried completely.

Checking the quality of fire processing of steel structures

The following documents attest to the quality of the product and the level of fire protection:

  • Acts from each quality check;
  • Acts for hidden work;
  • Additional documentation, which includes the recording of the thickness of the thickness, as well as the tests.

Representatives from the fire supervision department who have been certified in line with NPB product quality should sign the paperwork. A contractor licensed to perform pertinent inspections and works issues documents.

The following steps are part of the procedure:

  • Visual inspection;
  • Instrumental study (with or without destruction);
  • Probe;
  • Measurement with a magnetomer;
  • A fence of elements;
  • Testing, examination of paint in licensed laboratories.

The most famous manufacturers of fire retardants

There is a wide variety of fireproof products available, made by both domestic and foreign manufacturers:

    The brand "thermal barrier" in the market for more than 20 years and represents paints with different efficiency and at different price;

The cheapest, easiest, most practical, and most practical way to prevent metal structures from catching fire is to paint them with fire-retractable paint. This approach’s efficacy has been demonstrated time and again.

Feature Description
Purpose Protects metal structures from fire
Composition Contains fire-resistant materials
Application Applied directly to metal surfaces
Durability Long-lasting protection against high temperatures
Benefits Prevents structural damage during a fire

For metal buildings, firewall paint provides an essential layer of defense, particularly in settings where fire safety is of the utmost importance. These paints are intended to contain fires by slowing their spread, giving emergency responders and evacuation plenty of time. Because of this, they are crucial to the design and upkeep of buildings, especially in commercial and industrial contexts.

The capacity of firewall paint to expand in the presence of high temperatures is one of its primary characteristics. By producing a thick, insulating layer, this expansion helps to keep the metal cool and avoids structural failure. This characteristic is essential for preserving the structural integrity of metal buildings in the event of a fire, assisting in averting collapse and significant damage.

An additional crucial element is the range of available formulations. There are various kinds of firewall paints available, and the one selected should depend on the particular requirements of the project. While some are made to be applied easily, others have more protective features or improved durability. This adaptability guarantees that, whether building new or retrofitting old structures, there is a good option for every situation.

In addition to improving safety, firewall paint can help comply with legal requirements. The use of fire-resistant materials in specific types of structures is required by numerous building codes and safety standards. Builders and property owners can guarantee compliance and improve the general safety of their buildings by using firewall paint.

In conclusion, metal structure firewall paint is an essential tool for contemporary construction and safety procedures. Its special qualities offer essential fire protection, preserving property and saving lives. The application of firewall paint is a prudent investment in safety and resilience, whether for new projects or upgrades.

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Maria Vlasova

Chemist-technologist, expert on paint and varnish materials. I will help you figure out the compositions of paints, their characteristics and choose the best option for your purposes.

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