Grommet water-proofing method and wire-harness loosing jig

A grommet water-proofing method, wherein a wire harness is passed through the grommet and the grommet is subsequently filled with a sealing agent, comprising the steps of:

• providing a grommet having an enlarged diameter cup shaped open end and a smaller diameter end portion having a passageway therethrough;
• passing a wire harness through said passageway;
• engaging said wire harness above the cup shaped open end of said grommet with a first pair of clamps, thereby clamping said wire harness at a first location above the cup shaped open end of said grommet;
• engaging said smaller diameter end portion of said grommet, said wire harness extending through said grommet, with a second pair of clamps thereby clamping said wire harness at a second location below the cup shaped open end of said grommet;
• rotating said second pair of clamps, with said wire harness clamped therein, in a first rotational direction while holding said first pair of clamps with said wire harness clamped therein, in fixed rotational and axial positions, thereby twisting said wire harness;
• inverting said second pair of clamps with said wire harness clamped therein in a second rotational direction opposite of said first rotational direction to loosen wires of said wire harness;
• moving said second pair of clamps, with said wire harness clamped therein, axially toward said first pair of clamps held in said fixed rotational and axial positions, thereby separating wires of said wire harness in said enlarged cup shaped open end of said grommet;
• and
• filing, and thereby sealing the cup shaped open end of said grommet with twisted and separated wires therein, with a water-proofing sealing agent.