Abstract: A removable seal assembly for interconnecting the rear window of a pick-up style cab with the front window of a bed unit such as a camper or a bed cap. The seal assembly comprises an elastic tunnel having peripheral elastic rings provided at each of its two ends. A frame member with a peripherally defined channel is fixed to the inside of the cab and another such frame member is fixed to the inside of the bed unit. By stretching each ring to fit into its respective frame channel, a weather tight seal is created between the cab and the bed unit.