Used as a silylating agent in organic synthesis, particularly in the preparation of silicone-based polymers with tailored hydrophobic properties. Its reactive chlorine atoms allow for further functionalization, making it valuable in creating coupling agents for adhesives and coatings. Commonly employed in the manufacture of specialty silanes used in sealants, where the phenylethyl group enhances thermal stability and compatibility with organic matrices. Also utilized in surface modification of fillers and pigments to improve dispersion in polymer systems.