Hi
This is what I learned after doing a couple windshields myself (yes it’s possible to do alone but tricky and you should probably have help)

Install the rubber and glass without any compounds or else you will get it everywhere while fitting the rubber and glass
If you need lubrications use a small amount of plain water or soapy water

After you get the rubber and glass in and dry off all the water mess if any
mask off the exterior body and glass with good painters tape
Use many small wedges and open up the rubber to metal and pump in RTV black silicone in the gap
Massage it all down pulling out the spacer wedges and wipe off excess
Repeat for the rubber to glass outside
Then remove the masking
And enjoy your water tight glass forever
If done right you will never be able to push this glass out again
The rubber will have to be cut to remove the glass

RTV black is good to fill rubber gaps if they shrink or crack
It’s uV stable and very sticky and bonds well