8th International Conference on Clays in Natural and Engineered Barriers for Radioactive Waste Confinement, to be held from 8-11 June 2020. The Organising Committee invite all scientists, engineers and PhD students involved in the field of Clays in natural and engineered barriers for radioactive waste confinement to submit their proposals for oral presentations or posters communications during the next Clay Conference. Submission is now open until November 15th 2019, midnight (Paris time).