u/OkraTraditional

I’ll preface this by saying I have zero masonry experience, which is pretty self explanatory from the picture.

Anyways, I’m putting together this paver fire pit and I’ve been using refractory mortar to make a fire brick veneer on the inside. I made the last mix of the mortar I had way too thin, so I just skim coated all the brick to fill in any joint gaps I had.

My question is, mainly, is this a hazard at all? Is the mortar skim coat just going to crack and fall off eventually? I’m really just hoping there’s not any potential danger to this and was thinking this would be the right group to ask.