This paper identifi es, and works from, the technoconceptual as a site of intervention for a politics of stuff . Its case is radioactive waste: specifi cally, UK higher activity wastes (HAW) and the policy future of a UK Deep Geological Disposal Facility (DGF). The paper proceeds through three steps. It charts, fi rst, the unravelling of HAW as onto-politics through the democratisation of technoscience, showing that, as the gap between stuff and politics has opened, HAW's future in a DGF has become the preserve of science-technical discourses (currently geology and engineered design). Secondly, it joins with the undone-science traditions of STS (science, technology, and society), to critique existing technoscientifi c conceptualisations of a DGF and to anticipate a future in which a DGF is abandoned. Third, and in response to abandonment, it proposes a diff erent future for a DGF. This starts from thinking radioactive waste as 'thing power' but argues that, for a DGF to be materialised in ways that forge attachments with publics, requires a turn to material culture. More broadly, the paper argues that furthering ontopolitics requires keeping the demos alive to stuff 's vitality. This means engaging in political settlements of technoscientifi c controversies; with old, or established, technologies, and 'cold' politics; and in politics as practised.