BYK is BYK's long-standing number-one brand for a wide range of additives. This brand combines a broad portfolio of defoamers and air release agents, surface additives, adhesion promoter and coupling agents as well as some wetting and dispersing additives to provide the best properties for coatings..., printing inks, plastic materials and various other applications. BYK additives can be used in a broad range of applications and systems.