I decided to stop fighting the infiltration of dripping water into the greenhouse. It's impossible to seal out water with film repair tape. Instead I will collect the water and incorporate it into one of my aquaponics or hydroponics systems. I am running more gutter around the inside, just like I did to the outside. I will use EPDM or flashing to direct dripping water into the gutter and I will pump pond water or nutrient solution through, and I will put simple plants right into the gutter.