[Unfettered]

On both of my trucks, I sealed the factory brake light by removing the factory foam gasket and working foam weatherstrip (1/4" x 3/8") around the light fixture itself, and then pushing it in place and securing the screws. No silicone on my trucks. In my current truck, a former government vehicle, they actually bent the cab sheet metal to get some sort of roof light through, so I had that to push back in place, but no leaks. IMO the silicone makes a mess and will be hard to remove if you need to get access to lamps for any reason.