BRB International introduces phenyl silane for adhesion and surface modification
Last update on Jun 16, 2026
Formulators working on adhesion, surface modification, or sol-gel systems across coatings, sealants, adhesives, and electronics can now evaluate Silanil® 299, a phenyl-functional trimethoxysilane introduced by BRB.
According to BRB, the grade combines a hydrophobic phenyl group with hydrolysable methoxysilane groups, allowing it to act as a bridge between organic polymers and inorganic surfaces.
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Combining hydrophobicity, heat resistance and adhesion
The supplier reports that it forms siloxane (Si–O–Si) networks through hydrolysis and condensation, and indicates thermal stability, hydrophobicity, and chemical resistance as the resulting performance characteristics. As reference context, Surface Coatings International (Journal of the Oil & Colour Chemists' Association) describes silanes broadly as adhesion promoters, coupling agents, surface modifiers, hydrophobizing agents, and crosslinkers across industries.
BRB reports the following application areas for the grade:
Adhesion promotion in coatings, sealants, and adhesives
Precursor for phenyl silicone resins and fluids
Protective coatings for electronics, for moisture and heat resistance
High-refractive-index materials for optical applications, with a reported refractive index of nD20 ≈ 1.468–1.475
- Sol-gel systems and nanotechnology applications
The reported refractive index range gives formulators working on optical or encapsulation systems a concrete parameter to assess against their index-matching targets, rather than a general performance claim.
You can review the full technical data of adhesion promoters and request samples directly in the Master Catalog of Additives.