The invention relates to sealable squib connectors, in particular for airbag ignition systems. The connector including a connector housing with a plug-in projection, which plug-in projection has a mating face at its distal end; a seal expansion element; and a resilient sealing ring provided at the mating face of the plug-in projection between the mating face and the seal expansion element. The seal expansion element is being movable against the mating direction towards the mating face from an open position to a closed position thereby expanding the sealing ring.