Installing new (outdoor?) natural bbq grill

I finally built my bbq, of course never thought ahead of time
The rear edge of my grill does not line up perfectly with the opening i left for it, and to be hones the opening is not a 100% straight either. Can I use a bid of fire retardant caulk, like they use for the fire places?
How should I seal around the grill in general? In one sense I'd like to seal it all around really well to prevent water from coming inside the cabinet, on other hand I want to be able to take the grill out fairly easy if need be.
Any prevailing school of thought about this?
Thanks!

 

Hello: Newbie

Had to make an assumption here....

Suspect you're referring to an outdoor/patio or backyard BBQ?... Installed into a brick or brick type enclosure maybe? No specific mentioning of what type BBQ nor where it is located, etc.

Since the post was in Kitchen Gas Appliances and the nature/type of question does not apply to a repair, I moved your post here. Hope it is now in the correct forum topic where the professionals can better advise you.

BTW: Kindly clarify the word "HONES" used... Hones are used for sharpening as best as I recall. "Stones used for sharpening" as the dictionary's definition states. Kindly clarify what you mean please. Thanks....

 

Thanks,
and let me start clarifying:

hones is my attempt at saying honest, as in "to be honest" - sorry was in a hurry to post.
Your assumptions are correct i.e.
the bbq is an outdoor concrete filled concrete block structure on the patio of the back yard
and the grills are "natural gas" i.e. not propane
I hope there is someone with the gas appliances knowledge here on the concrete forum. I really don't care where the advise come from, as long as it does come and is reliable