ROOF RACK HOLES!!!?

So I just removed my 2008 Land Cruiser roof rack and some holes cannot insert the screws back. I apply black glue on those holes in order to prevent it from water leaking. My question is can it cause water leaking if I don't insert the screws back properly? Or is it okay if I don't insert the screws back?... show more So I just removed my 2008 Land Cruiser roof rack and some holes cannot insert the screws back. I apply black glue on those holes in order to prevent it from water leaking. My question is can it cause water leaking if I don't insert the screws back properly? Or is it okay if I don't insert the screws back? Your answer would be highly appreciate!
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