Fireproof paints: application features

Metal and steel structures, like other construction projects, need protection against fire. To prevent fire and limit the spread of fire, use fire fighting equipment. One of them is fire retardant paint. In everyday life, they rarely resort to such protective measures, but in industrial construction they are mandatory.

Why protect metal from fire

At first glance, it may seem that metal and steel structures do not need fire protection, since these materials are not prone to fire. However, in practice, things are somewhat different. An open fire in a matter of minutes leads to incandescent structures, which accelerates the flame propagation process. Moreover, at critically high temperatures (from 500 ° C) the metal loses its strength characteristics, which can lead to structural failure.

fire retardant paints

Fireproof paints for metal take on the following functions:

  • reduce the speed of fire spread;
  • give extra time to evacuate people.

The design, on which fireproof paint is applied, is able to withstand fire for up to 1.5 hours. This method of protection is most often used, since it gives an excellent result and is considered a budget option because of the low price.

Application steps

Fireproof paint is applied to metal structures in stages. In itself, the protective agent differs from those used in everyday life by a complex chemical composition. Such paints should be applied in several layers.

drawing fireproof paint
Work on the application of fireproof paint is carried out in several stages:

1. Preparation of the protected surface.

2. The primer.

3. Application of paint.

4. The application of the topcoat.

Surface preparation

At the initial stage, attention is paid to the preparation of the treated surface. Failure to perform the preliminary work may result in fire-retardant paint not protecting the product from fire. Metal structures can be cleaned mechanically and chemically.

Mechanical cleaning is carried out manually or using abrasive tools. Sandblasting is also used.

As for chemical cleaning, this method involves the use of rust converters and washing off old paint. After the surface cleaning work has been completed, it must be degreased to improve adhesion.

Soil application

Priming the painted surface protects the metal structure from corrosion and improves the adhesion of the paint to the metal itself. It is extremely important to pay due attention to the choice of primer composition and at the same time focus on the conditions under which the structure will be operated. Primer quality also plays a significant role. It is necessary to give preference to the composition, which is made according to GOST. Low-quality materials dry longer, and under the influence of a flame they are deformed and begin to peel off soon.

fireproof paint for metal structures

The application of a primer is permissible only on a prepared surface that has been previously cleaned and degreased. After the primer is applied, you can begin to stain.

Application of fire paint

When applying fire retardant paints, the manufacturer's instructions must be taken into account, observe the thickness of each layer and adhere to the time allotted for each of them to dry. If you do not deviate from the instructions, you can prevent cracking and swelling of the applied product.

fire retardant paint for metal

To apply paint with a flame retardant effect, you can use one of the following tools:

  • brush;
  • roller;
  • spray gun;
  • airless spray machine.

The paint machine allows you to apply the composition evenly, reduces paint consumption in large areas. This application method greatly saves time. As for the use of spray guns and spray guns, they are resorted to in case of work on a small area

Manual staining with a roller or brush is important when the surface has an intricate relief. This also applies to thin pipes, stair railings.

Protective coating

To extend the life of flame retardant paints, make the coating more resistant to moisture or change its color, you can apply a protective coating. Finishing is carried out using a composition in which there are components that provide moisture resistance and abrasion resistance.

Protective measures

Fire retardant paint for metal may vary in composition. If there is a solvent in it, it is necessary to carry out work in a room with open windows. Firefighters must be applied by people who have the appropriate skills and have special equipment.

High-quality fire-retardant paints do not emit toxic substances after drying, so you should not follow any safety measures regarding their operation.


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