BYK 3456 is a fluorine-free, silicone-containing additive that improves substrate wetting and leveling in aqueous systems and solvent-free UV systems. BYK 3456 greatly reduces static and dynamic surface tension, resulting in significant substrate wetting and leveling improvements. It enables difficult substrates that have porous and uneven surfaces to be effectively wetted. BYK 3456 does not stabilize foam, negatively impact recoatability, or increase surface slip. As a result of its high compatibility with various binder systems, even with a low proportion of co-solvent, BYK 3456 is ideally suited for use in modern systems. BYK 3456 provides benefits in applications such as improving adhesion in sealants, reducing defects in coatings, and enhancing durability in finishes.