I have had the exact same issues with my windshield, its near the driver side visor area. Ive have a windshield shop seal it twice and it still leaks really bad. How well is that 3M Windo-Weld working? I need to fix mine as soon as possible.
Glad you asked. It works perfectly. There is NO LEAK. It's fixed.
I actually disputed the charge with the merchant and am dealing with the credit card company now. Because I fixed it, they didn't.
You just need to dot your i's and cross your t's. Make sure it's that before conducting the repair. If you're getting that leaking after resealing the windshield twice, it may not be it.