Water Leak around Tail Lights

Is that on the Duster/Dart Sport in your picture? What year is it? I have a new set of DMT's for a '72 Duster. They were too thick for me to use. I ended up buying a coil of closed cell foam tape at the local Ace and was able to get mine sealed up.
If you are interested in the DMT gaskets I have shoot me a PM.
C