Fender Sealing

Early Darts were different then 67 on. I considered sealing the fenders, white RTV was what I was going to use. just a bead before installing the fenders. Did not like the gap you can see thru there. I had the fenders on and off so many times, it made no sense.
Mopar Tim, did you use anything when you put yours back together and do you believe there should have been some type of seal? I understand that they may not have used one but would it have been a good idea to use one?
Thanks Rod