I still don't understand the sudden interest in "rain tight". Wet locations imply water will enter the wiring compartment. That is why you need "wet" rated insulation on the wire.
Once we get the EMT/box junction sealed, are we going to start working on the box covers?
How long do you figure it will be until we can stop drilling holes in the boxes to let the water out?
Maybe they should do the testing with a pressure cleaner for us folks who live where the wind blows while it is raining.