An arrangement for shielding a gap between a pair of adjacently disposed electrically conductive structural members in a radio frequency shielded enclosure against leakage of radio frequency. The shielding arrangement includes a first compressible shielding member and a first retaining member for positioning the first shielding member adjacent an edge portion of one of such pair of structural members. There is a second compressible shielding member and a second retaining member for positioning the second shielding member adjacent an edge of opposed one of such pair of structural members, whereby each of the first and the second shielding members is compressed by an opposed one of the first and the second retaining means for shielding such gap against the leakage of radio frequency. One of such pair of structural members may be a personnel access door.