Water leak rear sedan taillight seem

[gabriel2012]

Hi guys, I just purchased a 2011 4door sedan with 29k miles, the car had been in a small rear collision on the driver's rear. Everything in the frame checked out at the body shop I took it to.

The thing is the seem of the rear taillight on the drivers side where the car was impacted is leaking. I hopped inside the trunk(yes, a dead body would fit nicely! ) and had my girlfriend spray the hose simulating rain and I found the leak. What is a good way to seal this metal seem? Any products or advice?

Besides this little nudge, the car is pristine and runs like new, my friend at the body shop couldn't belive I got it for 8k (I'm in Puerto Rico) I do 50miles of driving a day and coming back from a Jeep/Nissan Pathfinder my pockets feel nice at the pump