One, how many times should fire-resistant paint be applied?
The typical thickness requirement for interior steel structure fire-resistant coatings is 3-4mm, while thin-film fire-resistant coatings typically require 0.5-2mm per coat. Therefore, applying 3-4 coats of fire-resistant coating is recommended.
Two. What is the required thickness for applying fire-resistant coating in each coat?
The thin fire-resistant coating should be applied or sprayed in a thickness of 0.5-2mm per coat, with the thickness determined based on the material's properties.
If using a thin fire-resistant coating, the initial spraying thickness should be between 1-1.5mm. once the coating is applied,
Apply a second coat after drying to the touch, with a coating thickness that does not drip.
Construction Method: 1. Before construction, the steel structure surface must be treated to remove rust, and surface dust, oil, and other contaminants must be removed. Apply 1-2 coats of protective coating.
Rust paint.
2. Apply the coating using a volumetric sprayer with an air pressure of 0.4-0.6 MPa. Ensure the coating is thoroughly mixed.
3. Pay attention to applying the first coat of paint with a thickness of approximately 1mm, allowing it to dry before applying the second coat, which should be 2mm thick. Continue applying coats until the desired coating thickness is achieved.
4、Apply the coating to the required thickness, according to the fire resistance rating requirements.
5. When a smooth and even surface is required, apply a final coat of putty powder to level it out.
Three. Precautions when applying fire-resistant coating with a brush
1、Fire-resistant coatings should not be mixed with oil-based coatings in a wet state.
2. The construction temperature should be above 0°C. Construction should not be carried out in rainy weather or when the construction surface is wet or when the air humidity exceeds 85%.