A sealing boot for protecting an electrical interconnection includes: a main body having a cavity configured to house an interconnection of two electrical connectors; and a neck merging with one end of the main body and having a cylindrical inner surface that defines a bore that is continuous with the cavity of the main body, the inner surface having an inner diameter that is less than an inner diameter of the cavity of the main body. The inner surface of the neck includes a helical projection comprising a main artery and two tributaries, the tributaries each intersecting a section of the main artery at one end and merging with an end of the main artery at an opposite end.