BYK 3931 P is a synergist that works with standard leveling additives to enhance their effectiveness and prevent surface defects like craters, pinholes and other imperfections. BYK 3931 P displays excellent anti-crater properties due to its interfacial activity between air and coating surfaces. It produces a smooth and flawless finish. Especially suitable for formulations that are prone to cratering, BYK 3931 P can be used across all coating systems, even UV-curing ones. The product ensures perfect leveling when mixed in during processing and applied, delivering aesthetically pleasing end products free of any visual defects. BYK 3931 P helps formulate durable, high-quality coatings for applications that demand uniform, high-gloss protective layers.