Preparation before construction
stores reserve
Carefully check the product specifications, models, and other information of the two-component organic silicon high-temperature resistant coating to ensure that it meets the requirements of the construction project for high temperature resistance, chemical corrosion resistance, and other performance. At the same time, prepare the necessary diluents and curing agents, check the shelf life and packaging integrity of each component, and avoid using deteriorated or damaged materials.
Refer to the paint manual for key information such as the ratio requirements of the main paint and curing agent, as well as recommendations for the use of diluents.
Tool preparation
Prepare suitable construction tools, commonly used ones include electric mixers, airless spraying equipment, air spray guns, brushes, rollers, etc. Ensure that these tools are clean and free of residual impurities to avoid affecting the quality of the coating.
Debugging mechanical tools such as airless spraying equipment and air compressors to ensure their normal operation, such as adjusting the pressure adjustment knob of the airless spraying equipment to make its pressure adjustment sensitive and accurate, checking the atomization effect of the air spraying gun to ensure even atomization of the sprayed paint.
Environmental preparation
Choose a well ventilated, dry, and suitable temperature construction environment, generally requiring an ambient temperature between 5 ℃ and 35 ℃ and a relative humidity not exceeding 85%. Avoid construction in harsh environments such as high temperature, high humidity, and heavy dust to prevent affecting the curing effect and quality of the coating.
Take safety measures for the construction site, such as equipping fire extinguishing equipment, as organic silicon coatings and diluents are mostly flammable materials, to prevent fire hazards.
Substrate preparation
Thoroughly clean the surface of the substrate that requires coating (such as metal equipment, pipelines, etc.) to remove impurities such as oil stains, rust, old paint layers, dust, etc. Chemical cleaning (such as wiping with organic solvents, alkaline cleaning, etc.), mechanical polishing (using sandpaper, grinding wheel), sandblasting treatment (preferably reaching Sa2.5 standard), and other methods can be used for pretreatment to improve the adhesion between the coating and the substrate.
Check the flatness of the substrate surface, and for areas with obvious unevenness, repair or polish them appropriately to ensure that the coating can be evenly applied.
Paint blending
Accurately weigh
Strictly follow the ratio specified in the paint product manual, use a scale or measuring tool with appropriate accuracy to accurately weigh the amount of main paint and curing agent, and generally control the error within ± 5%. For example, if the instruction manual requires a mass ratio of 10:1 between the main paint and curing agent, it is necessary to accurately weigh according to this ratio during mixing to avoid affecting the curing effect and final performance of the coating due to inaccurate mixing ratio.
Mixing and stirring
Slowly add the weighed curing agent to the main paint, and use an electric mixer to stir while adding. The stirring speed should be moderate, usually controlled at around 300-600 revolutions per minute, to avoid excessive bubbles in the paint caused by too fast stirring speed. The stirring time is generally not less than 5 minutes to ensure that the curing agent is thoroughly mixed with the main paint, so that the paint color is consistent and there are no obvious lumps that have not been stirred evenly.
After mixing, add an appropriate amount of diluent according to the viscosity of the coating and the requirements of the construction method for dilution adjustment. The amount of diluent to be added should refer to the instructions, generally around 5% -15% of the total coating amount, while stirring to achieve good fluidity and viscosity required for subsequent construction operations.
Construction operation
Spray coating construction
Airless spraying: Pour the prepared coating into the material tank of the airless spraying equipment, adjust the spraying pressure according to the properties of the coating and construction requirements, usually around 10-20MPa. The operator holds the spray gun in hand, keeping it perpendicular to the surface being coated. The distance between the spray gun and the substrate surface is controlled at around 200-400mm. The spray gun is evenly moved at a certain speed for spraying. When spraying, the order of top to bottom, inside to outside, and difficult to easy should be followed to ensure that the coating is evenly covered on the substrate surface, avoiding phenomena such as sagging, missed spraying, and orange peel.
Air spraying: Adjust the pressure of the air compressor to 0.3-0.6MPa to atomize and spray the coating under the action of compressed air. The distance between the spray gun and the substrate surface should be kept at around 150-300mm. Move the spray gun at an appropriate speed for spraying, paying attention to controlling the spraying angle and moving speed to ensure that the coating is uniform and smooth. However, air spraying is relatively more prone to paint mist flying and slightly lower coating utilization, which requires special attention from operators.
Brush coating construction
For some parts with complex shapes and difficult to spray, such as corners, gaps, bolt connections, etc. of equipment, brushing can be used. Choose a high-quality brush with soft and non shedding bristles, dip an appropriate amount of paint, and evenly apply it to the surface of the substrate in a certain direction (such as from top to bottom, from left to right). Do not dip too much paint each time to avoid brush marks, sagging, and other problems. Ensure that the coating is flat and uniform in thickness. The thickness of each brushing is generally controlled at around 20-50 μ m, and the next brushing should be carried out after the previous coating is dry.
Rolling coating construction
For large-area flat areas with relatively low appearance requirements, rolling coating can be used. Dip the coating onto a roller and roll it back and forth on the surface of the substrate to evenly spread the coating. During the rolling process, pay attention to maintaining the moisture level of the roller to avoid uneven coating caused by dry rolling. Similarly, wait for the previous coating to dry before proceeding to the next rolling process.
Coating curing
Natural solidification
After the construction is completed, place the coated object in a well ventilated, dry, and suitable temperature environment, allowing the coating to naturally dry and crosslink according to its own curing characteristics to form a stable coating structure. The natural curing time usually takes several days, and the specific duration should be determined according to the requirements of the coating product manual. During this period, it is necessary to avoid contaminating the coating with dust, impurities, and other contaminants.
Heating solidification
Some two-component organic silicon high-temperature resistant coatings require heating and curing under certain temperature conditions to improve the performance and curing speed of the coating. The coated object can be placed in a specialized oven or heated using its own heating function (if feasible) according to the specified curing temperature curve (such as first heating to a certain temperature and holding for a certain period of time, then gradually heating to a higher temperature and holding for the corresponding time, etc.), strictly controlling temperature, time and other parameters to ensure that the coating is fully cured.
Quality inspection and repair
Appearance inspection
After curing, inspect the appearance of the coating to see if it is flat, smooth, and free of defects such as sagging, bubbles, pinholes, and peeling. Mark any areas that do not meet the requirements for subsequent repairs.
Thickness detection
Use professional tools such as coating thickness gauges to detect the thickness of the coating, ensuring that the coating thickness meets the design requirements. If the coating thickness is insufficient, it needs to be repaired until the specified thickness is reached.
repair
For areas where quality problems are detected, such as local peeling, pinholes, etc., the problem area should be cleaned first to remove damaged coatings, and then the coating should be re mixed, applied, and cured according to the above construction process to ensure that the coating quality meets the requirements and can effectively exert high-temperature resistance and other protective properties.

Room termperature curing polysilazane, pls check IOTA 9150, IOTA 9150K.    
High termperature curing polysilazane, pls check IOTA 9108, IOTA 9118.