Rear Window Defogger System: Repair

Clean the broken portion with alcohol or white gasoline.
Mask both side of wire with masking tape.
Apply conductive silver composition to the damaged point.
Conductive silver composition:

Permatex

QUICK GRID

Fig 1: Applying Conductive Silver Composition To Damaged Point
Courtesy of SUBARU OF AMERICA, INC.
After applying conductive silver composition, dry it using a drier.
After repair, check the wire.