How to Apply Polyurea? Step-by-Step Application Process

Polyurea is a fast-curing, high-performance coating and insulation material that has been gaining popularity in the construction industry in recent years. The application process, when carried out with the correct steps and using appropriate equipment, yields highly effective and long-lasting results. In this article, we will examine in detail how polyurea application is performed step by step. Polyurea coatings are used in a wide variety of areas such as waterproofing, flooring, corrosion prevention, and structural reinforcement. Thanks to its high elasticity, chemical resistance, and rapid applicability, it offers significant advantages over traditional coating materials. A correct application ensures that you benefit from these advantages of polyurea to the fullest extent.

The success of polyurea application depends on surface preparation. The surface to be applied must be clean, dry, and sound. Dirt, oil, dust, rust, and loose particles on the surface must be cleaned. This process is usually done by mechanical methods (grinding, sandblasting) or chemical cleaners. After surface cleaning is complete, the surface roughness should be increased. This allows the polyurea to adhere better to the surface. If necessary, a primer can be applied. The primer acts as a binder between the polyurea and the surface, increasing adhesion strength. The primer selection should be made according to the type of surface and the polyurea formulation. In addition, ventilation of the application area is also important. The evacuation of gases released during polyurea application is necessary both for the health of the application personnel and for the quality of the coating. The temperature and humidity of the application area should also be taken into account. Applying within the temperature and humidity ranges recommended by the manufacturer ensures the best results.

Polyurea application is usually done by spraying. In this method, a two-component polyurea system is mixed under high pressure using special equipment (polyurea reactor) and sprayed onto the surface. The spraying process must be carried out by experienced and trained personnel. The polyurea machine must have a heating system and be able to mix the components in the correct proportions. The machine must be regularly maintained and its calibration checked. The nozzle (spray tip) used during application should also be selected according to the surface characteristics and the desired coating thickness. In addition to the spraying method, polyurea can also be applied with a brush or roller in some cases. However, these methods are generally suitable for smaller areas or detail applications. When applying with a brush or roller, care should be taken to distribute the material evenly and avoid the formation of air bubbles.

During polyurea application, it is generally preferred to apply in layers. The thickness of each layer is determined in line with the manufacturer's recommendations. Sufficient waiting time should be given between layers. This time is necessary for the polyurea to cure and adhere better to the next layer. The effect of wind should also be taken into account during application. Wind can cause the sprayed polyurea to disperse and the coating thickness to be irregular. If necessary, precautions should be taken to cut off the wind. After the polyurea application, the surface of the coating should be checked for any defects (bubbles, cracks, holes, etc.). If there are any, these defects should be repaired using appropriate methods. The repair process should be carried out using the same polyurea system or a compatible repair material.