What is NBL fireproofing paint? How to apply NBL fireproof paint?

Fireproofing paint is a fire protection solution that is widely applied to steel structures. NBL fireproofing paint is popular because it offers many advantages. So how does this paintwork? This article will help you to know more information about this paint.

What are the outstanding advantages of NBL fireproofing paint compared to other paint lines?

NBL water-based fireproofing paint possesses the following advantages:

• Safe, friendly to employees and the environment.

• Has VOC content within the allowable threshold for safety for users, meeting LED standards.

• There is a low content of toxic heavy metals in the paint, which is not harmful to the health of construction workers and workers.

• The adhesion on all material surfaces is good, helping the paint effect to promote well.

• Paint has fast drying time and high water resistance.

Construction process of NBL fireproofing paint for steel 120 minutes

The process of applying NBL fireproofing paint on steel structure is simple, there are not many complicated requirements compared to some other paint lines. However, the constructor needs to accurately calculate the thickness of the paint layer to ensure a reasonable fire resistance time.

Step 1: Before applying fireproofing paint, it is necessary to treat the surface

This surface treatment step determines the aesthetic level after completion and the ability to protect the material of the fireproofing paint. Surface must be clean, free of rust, reasonably rough and meet SA 2.0 or higher standards. Usually the construction team will use a sandblaster or a water jet to clean a large area.

Read more: Fireproofing paint and the most necessary and useful knowledge about it

Step 2: Understand the construction norms of fireproofing paint according to safety standards

Construction of NBL-P022 anti-rust paint and NBL-R137 coating must meet the following standards:

• Anti-rust paint NBL-P022: 0.1-0.2 kg/m2 dry film thickness is 30µm- 50 m

• NBL-R137 fireproofing paint: 1.6 kg/m2, dry film thickness is 770µm -800µm

• The total thickness of the paint layers falls in the range: 800 m- 850 m

• To achieve a fire resistance time of 120 minutes, the application process must not take place in conditions of humidity above 80% and high weather temperature. When the coating is completed, the paint needs a certain amount of time to dry. During this time, you need to cover the material to avoid bad weather affecting the paint quality.

Step 3: Follow the correct construction process of fireproofing paint

Before applying fireproofing paint, you need to stir the paint with specialized equipment to make sure the paint is thin and even. In addition, you must choose the right coating equipment for the material and surface area.

If NBL-P022 anti-rust paint has a standard rating of 0.1-0.2 kg/m2, the installer should coat it 1-2 times with a roller or sprayer. When using a roller, the operator needs to roll his hands evenly to avoid paint melting or forming long streaks on the surface. In order for the fireproofing coating to be highly effective, you must ensure that the paint has covered the steel surface. When the paint is completely dry, use a thickness gauge to check the paint film before applying the next layer.

In the case of using NBL-R137 with a rating of 1.6 kg/m2, you use a roller to roll the paint on the surface 4-5 times, roll evenly, roll from 0.5-1m2 for 1 time and dip the Rulo. After that, you wait for the paint to dry before applying the next layer to avoid wrinkles.

Notes when applying paint:

• Drying time depends on weather conditions, temperature and air humidity. The higher the humidity, the longer the drying time will be.

• After completing the fireproofing coating, you need to measure the paint thickness. Standard coatings will be available in thicknesses from 800 µm to 850 µm (including two anti-rust paints NBL-P022 and NBL-R137).

• After the paint is completely dry, make sure your hands are not sticky, press your nails without leaving any dents, you proceed to apply an Alkyd or Epoxy based topcoat.

Read more: What type of fireproofing paint offers the best performance?

Step 4: The process of testing fireproofing paint samples to verify safety

- Choose a steel sample with dimensions: 480mm x 480mm x 5mm

- After that, paint according to the standard procedure of fireproofing paint for 120 minutes.

- Conduct painting at the construction site. Take a steel sample at the scene, then seal it and send it to the Fire Department for testing for 120 minutes of fire resistance.

Hope the article has helped you know how to apply NBL fireproofing paint effectively and safely. In order for the paint job to be carried out smoothly and quickly, you should ask for the help of a reputable construction team.