Calculations of the pair polarizability of Ne2 at both the SCF and CI levels are reported. The calculations are made using the finite field method. Basis extension corrections are made at the SCF level. These corrections are found to have a large impact on the computed values of the trace. Agreement of the large R values (R > 8 a.u.) with the DID expressions is obtained.The CI calculations show that the anisotropy appears to be calculable from the SCF results by scaling. The trace is a more complicated quantity. Electron correlation terms are clearly quite important in the region of the potential well. Values of the second dielectric virial coefficient are calculated. Agreement with experimental values is not obtained. Comparison with the trace and anisotropies used in predicting lineshapes is encouraging.