can be in electrical contact with the solenoid terminals 110 typically the wire insulation 116 is made from a polyvinylchloride pvc material that contains plasticizers and lubricants as discussed above which is the source for the inability to properly seal such material using prior methods this insulation 116 is necessary for example to achieve 300 volt ul recognition for a 20 gauge 7 strand wire used in the exemplary embodiment of fig1 a small collar 118 formed from adhesive heat shrink tubing is attached to the outer surface of the insulation 116 near but preferably displaced from the end of the insulation where the wire 114 is attached to the terminal 110 in a preferred embodiment the collar 118 is approximately u215b inch in width and is heat shrunk into place on the insulation 116 approximately 1 10 inch from the end of the insulation 116 formed when the insulation 116 is stripped away to reveal wire 114 in one embodiment a tyco raychem adhesive heat shrink is utilized to form the collar 118 during the heat shrink process the collar 118 adhesively bonds tightly to the insulation 116 around each of the wires 114 providing a water tight seal once the wires 114 with the collar 118 in place on each thereof have been.