Originally Posted by Ricky Bobby

Didn't need to. As long as its wedged in there good it's not budging one mm.

I actually used glass cleaner as a lubricant and had to use a small putty knife to "pry it" into the channel and so it locked in place, at first it was only kinda half way in there but once I went over the strip in the groove a couple times to wedge it in all the way, its perfect now. Shouldn't need any silicone, if you used some you might not have it in there all the way.