Before the tratterers start posting crap... he stuck the plastic sheet (behind the door card plastic) on the inside of the door with tape, not the door itself.
Went to local parts shop got a tube of tiger seal pulled off the tailgate door card and then sealed it up then used more tape to hold it in place while it dried will water test when it next rains or wash the car lol
I also remember when tiger cost less than a fiver not almost a tenner