Costelan C DA 619 is a universal and water-soluble fluorosurfactant that changes the surface energy in very low concentrations. VOC- and APEO-free Costelan C DA 619 is compatible with additives and resins of any ionic class. The product is stable in acidic, basic and saline solutions as well as in hard water. Due to its good stability over a wide pH range, Costelan C DA 619 is, among other things, an optimal wetting aid in immersion bath applications. It can also reduce surface tension in cleaning formulations.