I've been contemplating using some weatherstripping to close the gaps around the headlights so today I gave it a shot. My trip to Home Depot resulted in 2 possible products that looked to be about the right size, both using 3M self adhesive. After getting home and messing around a bit, I decided on the rubber one. It states it's 5/16" thick. There were some other rubber ones that were 3/8" but not in black. I removed a headlight and cleaned it with denatured alcohol, and although I had only intended to apply it to the top and sides, I decided to do the entire perimeter. I did my best to follow the body lines as they move around the housing but it's not perfect. I didn't want to pull it off and reposition it so I might get another roll and remove the old/ apply new. It's not bad though, looks way better. I put the seam at the bottom where it won't be noticed. Before and after pics are in the next post.