Recently soil non-wettability has been found to develop under a range of conditions. The research to be presented shows that a dried sediment does not become wettable even after 72 days. The sediments in this study have undergone extensive physical and chemical characterization to gain insight into the mechanisms behind how these sediments become non-wetting once placed on the surface. Our research shows that the observed sediment non-wetting does not appear to depend on the mineral phase and only requires very little organic matter. A mechanism consistent with the observation will be presented to explain the non-wetting behavior as well as the mineral and organic matter composition of the studied sediments.