BYK P 9915 is a viscosity depressant additive that improves the flow properties of reactive systems. It reduces the viscosity of high-viscosity formulations allowing for better mixing and homogenization. BYK P 9915 can be incorporated into the system through its OH functionality. As a result, it enhances the application properties of coatings and ensures a uniform film build. BYK P 9915 additive promotes a smoother application and a defect-free surface finish.