Polysiloxane nanocomposites, a class of advanced materials, have garnered significant attention in recent years due to their remarkable physical and mechanical properties. This study provides a comprehensive exploration of the physical and mechanical characteristics of polysiloxane nanocomposites, shedding light on their potential applications in various fields. The investigation begins by discussing the synthesis and preparation methods of polysiloxane nanocomposites, emphasizing the role of nanofillers such as nanoparticles and nanotubes. These nanofillers enhance the material's mechanical strength, thermal stability, and chemical resistance, making them highly attractive for diverse industrial applications. the study delves into the physical properties of polysiloxane nanocomposites, including their thermal conductivity, electrical resistivity, and optical properties. These materials exhibit exceptional thermal insulation, low dielectric constants, and excellent optical transparency, making them suitable for applications in microelectronics, optics, and aerospace