I installed my windshield with new rubber and no mastic or caulking. I haven't been caught in one of those gully creating downpours but have driven in some rain. No leaks yet, it's been about ten months.
1953 Chevrolet 3600 Fried Green T'mater (Vern) In the Stovebolt Gallery Caution: Political Statement Man who runs in front of car gets tired, man who runs behind car gets exhausted.