A PDMS-containing PU oligomer with triethoxysilane as the terminal groups that is obtained from NCO-terminated PU prepolymer with aminopropane triethyoxysilane (APTES). This PU prepolymer (PDMS-APTES) is prepared by the reaction of polydimethylsiloxane diol (KF-6001) with excess amount of isophorone diisocyanate (IPDI). PU/silica hybridized composites are obtained by the blending of PU prepolymer (PDMS-APTES) with tetraethoxysilane (TEOS) and nano-silica in various dosages, via a sol-gel processes, respectively. The PU/silica hybrids are evaluated by the measurements of physical properties, such as gel content, water absorption, contact angle, hardness. Even though the thermal stability (TGA) increases and the transmittance of UV/visible spectrum is decreases as increasing nano-silica dosage. That is due to the aggregation occurs when the dosage of nano-silica increases, however, SEM micrographs proves that the dispersion of silica is still in nano-scale.