Patent ID: 8304649

Claim:
A wire waterproofing method for a wire to be arranged in a water susceptible area of a vehicle, the wire having a core made up of a plurality of strands covered by an insulating coating layer, wherein the method comprises: removing the insulating coating layer in a lengthwise intermediate part of the wire to expose the core, and dropping a fluid waterproofing agent to the exposed core section and at the time of or after the dropping of the waterproofing agent: infiltrating the waterproofing agent into clearances between the strands of the exposed core section, inserting a part of the wire where the waterproofing agent is dropped and parts of the insulating coating layers at the opposite sides of the part of the wire where the waterproofing agent is dropped in a pressurized container in a sealed manner, supplying pressure air of 50 to 300 km/cm 2 into the pressurized container to press the dropped waterproofing agent into the exposed core section and the inside of the insulating coating layer, and thereby infiltrating the waterproofing agent between the strands of the core inside the insulating coating layer.