tert-Butyldimethylsilane is an organosilicon compound primarily used in hydrosilylation reactions. It acts as a silylating agent, adding the tert-butyldimethylsilyl group across carbon-carbon multiple bonds in alkenes and alkynes, typically catalyzed by transition metals such as platinum or rhodium. This reagent is essential in the synthesis of organosilicon materials, including siloxane polymers, silicone surfactants, and functionalized silanes for applications in coatings, lubricants, and pharmaceuticals. The bulky tert-butyl group provides steric control, enhancing regioselectivity and stereoselectivity in catalytic processes. It is also employed in certain reduction reactions and dehydrogenative silylations, offering compatibility with sensitive functional groups.