'69 windshield gasket...two kinds of sealer?

THIS:

View attachment 1715726900

If you really want it to seal out water......
Just know that this sticks with a death grip. If you ever have to replace the windshield, it will require a new gasket because this bonds to everything.
Thats what id use on a newer car deal or a 'fk it lets fill the holes and flip it' or run it into the ground kinda venture. LOL