BRB Silanil^® 299 is a high-performance phenyl-functional trimethoxysilane characterized by the combination of a hydrophobic phenyl group with hydrolysable methoxysilane groups. This enables it to act as a molecular bridge between organic polymers and inorganic surfaces. It provides enhanced thermal stability, hydrophobicity and chemical resistance.

Key applications include an adhesion promoter in coatings, sealants and adhesives; precursor for phenyl silicone resins and fluids; protective coatings for electronics (moisture and heat resistance); and as high-refractive-index materials for optical applications; and advanced uses in nanotechnology and sol-gel systems.