I'm building a fire pit…Just like in this video.
At 1:40 he is using an adhesive (looks like versa-lok concrete adhesive). I didn't think it was needed, but I like the idea. I thought video would use it on the base, but they use it only on the courses.
I didn't see anything about high heat in on the tub.
Is it effective under heat?
Can something like this give off dangerous fumes when heated?
Best Answer
Regarding Loctite PL 500 landscape adhesive (mentioned in the asker's answer)...
No, landscape adhesive (or at least that specific product) isn't rated for temperatures encountered in a fire pit.
That said, if you put a bead toward the outside of the course rings I'd expect it to hold up fairly well. Temperatures out there may get high enough to soften it, but probably wouldn't burn it.
Of course, there may be landscape adhesives (or products that could serve as such) with higher temperature tolerance.