Windshield trim help needed

This started a couple weeks ago. I think its rust jacking from the steel core of the trim piece maybe?  The rubber/plastic is kind of deteriorated from most likely sitting in the sun for the last 21 years,

Im sure a replacement is NLA, and Im trying to get it thru one more year, its kind of dursbility experiment at this point with 265k.

(Please disregard disaster area in background)

I was thinking to get a thing of windshield adhesive and try to stick it back down?  It doesnt leak so my assumption is that its cosmetic only.

Any other ideas?

I would try that or i have some clear silicone you can have that the cable guys left if you don't want to buy a tube. 

Leave it, or pull it all off. 

Since windshields are regularly replaced, sure that it's NLA?