The ASTM D5324-16 (2022) Standard Guide for Testing Waterborne Architectural Coatings provides standardized methods for testing the performance of waterborne architectural coatings. The guide details test methods for evaluating the physical, chemical, and mechanical properties of water-based paints, including key indicators such as coating weathering resistance, stain resistance, adhesion, leveling, and drying time. Water-based paints are widely used in the construction industry due to their environmental friendliness and low VOC emissions, so accurate testing of their performance is essential. This standard provides a comprehensive testing process for coatings manufacturers, research institutions and regulatory authorities to ensure that coatings comply with market demand and regulatory requirements. By following this guide, product mass can be improved to ensure the application effect and long-term performance of waterborne architectural coatings.