The application performance of the new non-VOC odorless coalescing agent RTC-280P in waterborne interior and exterior wall architectural coatings is investigated.The commercially available mainstream coalescing agents in the market are used as the reference test objects,focusing on the compatibility with the emulsion,the MFT reduction efficiency,and the impact on the odour,scrub resistance,paint film color spread,and initial water resistance of the waterborne interior and exterior wall architectural coatings.