Used as a silylating agent in organic synthesis, particularly for the protection of hydroxyl groups in alcohols and phenols. Its bulky t-butoxy groups provide high selectivity and stability under various reaction conditions. Commonly employed in the preparation of sensitive intermediates in pharmaceuticals and fine chemicals, where controlled reactivity and minimal side reactions are critical. Also utilized in the surface modification of silica and other materials to introduce hydrophobic characteristics, making it valuable in coatings, adhesives, and composite materials.