This work was focused on characterization of surface properties of various types of silica used for elastomers. The influence of temperature and length of degassing on the resulting specific surface of silica was studied. Eight types of precipitated and pyrogenic silica samples were investigated in terms of surface characteristics as specific surface, porosity and morphology that directly affects these properties. For characterization was performed using sorption methods, scanning electron microscopy and IR spectroscopy. From the results of the analyzes it was found that the properties of precipitated and pyrogenic silicas differ significantly in terms of particle size, structure, porosity and size of specific surfaces. The degassing temperature and time largely influence the behavior of nitrogen adsorption and hence the measurement results.