①Surface treatment of steel structure: Before the construction of fireproof coating, the surface of steel structure should be derusted and coated with anti-rust primer. After the steel structure is installed, the dust, oil, and debris on the surface of the anti-corrosion paint should be cleaned up before the construction of the fireproof paint.

②Stirring and dilution before construction: The paint needs to be fully stirred in the bucket with an electric mixer before application. If it is necessary to dilute the paint due to overheating of the climate, it shall be diluted according to the specified ratio.
③The most commonly used method is to use spraying, roller, and brush for rolling and brushing construction. The coating should be applied in stages as required to achieve the specified thickness.
④ The coating can also be sprayed with a high-pressure airless sprayer when the conditions are met or the requirements for a higher surface effect are required. The coating should be sprayed in multiple times as required to achieve the specified thickness.
⑤After the coating is applied, the topcoat must be applied once the fireproof coating is dry, and the topcoat must be cured for at least 2 days.
⑥ During the construction process, the wet film should be controlled every time to avoid the consequences of poor quality caused by over-thick coating.

Picture of combustion test of intumescent steel structure fireproof coating（1）

Picture of combustion test of intumescent steel structure fireproof coating （2）

Physical application of fireproof coatings for intumescent steel structures