I have a VW Passat with a shark fin antenna. The antenna has a rubber gasket for waterproofing, a plastic case and the antenna circuitry inside.
While washing the car, I hit the antenna case a bit too hard and the top plastic case broke off from the bottom case. Currently, the top case it is held in place only by the gasket. Looks fine, the antenna still works.
The problem is that the gasket will definitely not be able to waterproof anymore. I know that this needs to be fixed at some point, but the question is how urgent should this repair be?
Can there be electrical issues? Can water damage the roof inside? Any advice for a temporary fix?