Nanocomposite particles have different structures, compositions and the characteristics. The bonds between the nanocomposite particles play an important role in enhancing and limiting the properties of the material. The more particles interact, the stronger material bond. Polymer concrete has been widely used as a substitute for cement which can produce higher compressive strength in a shorter time through composite engineering thus it is impermeable to water, not affected by UV rays, and resistant to chemicals. Combining the epoxy resin and the hardener materials which have strong characteristics against compressive strength, bending, tensile and modulus added by nanosilica which can increase the maximum strength to form a polymer matrix bond. The composition of a mixture of fine aggregate, epoxy resin, hardener and nanosilica heated at a temperature of 85°C for 1 hour can produce a new material that is stronger and slighter than the previous material obtained from a mixture of 38.2% sand, epoxy resin and hardener with a ratio of 1: 1 and nanosilica levels at 0.28% by the weight of epoxy resin were obtained with a density of 1,464 kg/m3 and a compressive strength of 577.669 kg/cm2 with initial and final bonds of 40 and 60 minutes. The characteristics test of Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM) and X-Ray Diffraction (XRD) showed that SiO2 is more dominant and has an amorphous phase, where in this phase the crystal arrangement is not very dominant. The addition at a certain temperature can increase the strength of the nanocomposite material. If it is given a higher temperature, the material has brittle properties which can decrease the strength.