Automotive tinting specifics
Defroster Lines
Defroster lines are the thin electrically-heated wires bonded to the inside of the rear windscreen; tint must be applied carefully to avoid damaging them during installation.
Defroster lines are usually copper or silver paste laid in horizontal strips with a thin protective polymer. They conduct electricity when the rear defrost is switched on, heating the glass to clear moisture.
During tint installation the squeegee must move along — never across — the defroster lines, and never push so hard that the wires lift or fracture.
Damaged defroster lines are one of the most common installation defects. A reputable workshop will check the defroster works post-installation; we always run a quick functional check before releasing the car.