This Small Business Innovation Research Phase II project aims to commercialize a novel paint and primer system that manages indoor moisture and suppresses mold growth, with an initial focus on residential and commercial bathrooms. Mold exposure in buildings is a significant health and economic issue, contributing to respiratory illnesses and extensive maintenance costs. This innovation offers a passive, affordable, and easily retrofitted solution for improving indoor air quality and preventing costly moisture damage. By reducing the latent load on heating, ventilation, and air conditioning (HVAC) systems, the coatings can also enhance energy efficiency. This project will increase the economic competitiveness of the United States by strengthening domestic manufacturing, creating a new high-value export category, and stimulating innovation in the built environment. The technology is designed to deliver broad-based benefits to Americans across all regions and housing types. Commercially, this effort targets a significant opportunity within the $60 billion global decorative coatings market, with an estimated multi-billion-dollar addressable segment in moisture-prone spaces. Successful deployment could shift market expectations by embedding high-performance functionality into standard architectural coatings. The intellectual merit of this project lies in its development of a multi-functional coating system that combines high-capacity moisture storage with directional vapor tran