A vaso-occlusive assembly (1) having an implantable device (2) which has a lumen (5) and a liquid agent infused in the device (2), the liquid agent providing rigidity by self-polymerization or interaction with further reactive agents.Linvention concerne des assemblages dembolisation que lon peut renforcer in-situ. Linvention concerne également des procédés de fabrication et dutilisation de ces assemblages.