Fumed Silica Hydrophilic Uncoated ) is a wetted by water and can be dispersed in water. Applications: Hydrophobic Fumed Silica is used in a variety of applications but not limited to adhesives, elastomers, composite materials, powder coatings, inks, glassy metals, greases, flask resins, sealants and toners. We offer a variety of grades based on specific surface area.