Hey everyone I installed my evo-r carbon fiber lip yeaterday and of course theres some fitment issues

I'm wondering if there is a type of black sealant that I could buy to somewhat fill the gap. 1. To fill the gap and 2. to hide gray colored tape.

Another question that I had is if there is a type of sealant that won't do gnarly damage to my bumper if I ever do decide to take this piece off.
Thanks ahead of time