Buyers must prioritize the Thermal Conductivity (K-value), where a lower value indicates better insulation performance. Additionally, verify the Solar Reflectance Index (SRI) for cool-roof applications; a high SRI (typically >78) is essential for reducing cooling costs. Ensure the coating has high Adhesion Strength (measured in MPa) to prevent peeling on substrates like metal, concrete, or wood, and check the VOC (Volatile Organic Compounds) content to ensure it meets environmental safety standards.