The use of thermodynamic hydration equations has wide applicability to predict the durability of natural, ancient, modern and nuclear waste glass. Predicted durabilities correlate with those observed in nature and give a means for interpolation of the long term durability of nuclear waste glasses. Through hydration thermodynamics, the relative durability of commercial glasses can be determined and can help in archaeological studies. The hydration thermodynamic approach was shown to apply to such measures of reaction progress as releases of Si, B and K to solution in both short term and long term laboratory tests. The approach was also shown to apply to glass surface "depths of attack" from two year and five year in situ burial tests in Sweden and the UK.
