BYK 331 is a polyether-modified polydimethylsiloxane additive that reduces surface tension and increases slip to a medium level. BYK 331 improves leveling, gloss and substrate wetting in solvent-borne, solvent-free, and aqueous systems. It prevents the formation of defects during drying and application. BYK 331 also provides anti-blocking properties to maintain smooth surfaces. As a result, BYK 331 additive enhances performance of coatings by allowing for better coverage and appearance of coated surfaces. It can be used across a wide range of chemistry types and processing methods. BYK 331 is recommended for various coating and surface applications requiring these benefits.