Abstract: Die plates for forming moisture seals about the junctions of wire harnesses afford improved wire separation and contact between the sealant material in a sealant pad and the wires if the opposed die plates have an elastomeric surface, and the opposed surface of at least one plate is radiused causing the sealant material to separate the wires and flow between and around each wire.

Abstract: A closure for use in providing an environmental seal about a wire junction. The closure comprises a closable shell defining, when closed, an internal wire junction receiving chamber having first and second opposite open ends, for receipt of wires therethrough. The shell comprises first and second shell sections, and an interference fit locking arrangement oriented between the shell sections. In one embodiment, the shell sections are unitary, i.e. they are joined along a hinge line. In an alternate embodiment, the shell sections are independent of one another, but engageable in a nesting manner. The interference locking mechanism preferably comprises a plurality of elongate, continuous, interengageable rachet teeth. In use, sealant material is positioned within the shell sections, and a junction to be sealed is enclosed therein.