Need some ideas on how to seal upper windshield. When driving in the rain the wind forces water up under the top seal and runs down inside the windshield.

 

Replace the windshield seal. You should not have any water running down the windshield from the inside. You would get some water between the windshield header and header of the top then the drip drip onto the dash pad. That happens because water is pushed up into the crack. It usually takes a lot for mine to leak there plus have to be going above 30 or so to force the water upwards. Then again a simple towel will get the job cleaned up. It stays somewhat dry inside when it is parked in the rain. It probably happened to me a 5 times. Once overnight it rained heavily. I surprised on how dry it was even with the convertible top.

 

Not wanting to take the windshield apart.

 

In that case I would have a windshield replacement company try to squirt some sealant up into it as they have the right stuff and will clean up any mess.