Activity Feed › Forums › Sign Discussion › Vinyl › another Contravision question › Reply To: another Contravision question Stuart Miller Member May 12, 2009 at 5:21 pm quote Lorraine Clinch: Hi Stuart I know it sounds daft! (My question, I mean, not yours!) It’s to go on the rear window of tractors, to stop sun glare off the instruments. They also have their logo on it. That sounds like a job for window tint, not contravision. reduce the heat and glare and no real reduction in visibility. Life span of 10 years.