| Sovereign Group of Companies |
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| Sovereign's NOH20 grout has successfully sealed tunnels, waste depositories, shafts and more. >> more | NOH20 grout is applied by injecting it through strategically drilled holes into the water strata of the rock complex. >> more | Our new ideas and innovative products make us a lively, enthusiastic company, striving to make a positive difference in the world of sealing technologies. >> more |
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