The sealing device is disclosed which is composed of an intra-arterial occluder (11) and an extra-arterial occluder (13), both preferably made of resilient biocompatible and/or bioabsorbable material and held in place via a toothed guide (12) extending integrally from the intra-arterial occluder (11). An insertion tool (23) may also be provided to effect sliding of the extra-arterial occluder (13) over the guide (12) and fixation of the extra-arterial occluder (13) to the guide in sealed relation over an opening in body tissue and safe cutting of the guide. A force gauge (47) is provided on the tool to indicate the sealing pressure on the intra-arterial occluder (11). <IMAGE>
