Elastomeric coatings are applied to roofs, walls, and structural surfaces for their flexibility, waterproofing, and UV resistance. Elastomeric polyurethanes bridge cracks and waterproof substrates like concrete and metal. When properly installed, these coatings provide long-term protection and durability. However, defects can occur if surface preparation, application, or environmental conditions are not controlled.

Understanding these defects and how to prevent them is essential for contractors, inspectors, and asset owners. The following outlines common elastomeric coating defects, their causes, and prevention methods.

Understanding and following the manufacturer's written guidelines and technical data sheets are essential to achieve the best application of coating possible. Focusing on critical factors, such as choosing the right type of coating, surface preparation, and application methods will ensure everything is done correctly. By doing so, you can be confident you'll get the desired results and have a coating that looks great and performs well in its environment.

Here, we'll discuss the importance of adequately mixing multi-component coatings before application. When mixing single-component coatings, the applicator brings them to a uniform color or condition. However, when mixing multi-component coatings, the process is more involved.

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