Great stuff or backer rod?

You might want to re-read what you posted and re-write it so it makes sense !!!

A basement ceiling is an odd place for a French drain.

Yes, backer rods are great stuff.

Your welcome and advance

Obviously using spell checker - - -

Huh? What aspect of the drain are you trying to seal? Presumably, anything you're talking about, here, would be below grade and have to endure those conditions "indefinitely"...

I THINK he is talking about sealing between the new slab and the wall/foundation.

Yea, I did sort of "read in" the word "sealing" instead of "ceiling". People all make typos, but they could at least try to use the right words so they make sense....

Anyhow, most if the time people use backer rod between a slab and put some asphalt based liquid crack sealer on top to keep water out. (I'm assuming "backer rod" is that round foam stuff which is sold in different diameters).

And where does the french drain come into the calculus?

"I'm looking to purchase a new car. Should I order the cheese and pepperoni or anchovy with extra onions??"

Ans: Javelina

Or, maybe, 904 stainless?

(sigh)

Dave posted for all of us...

My crystal ball is cloudy. Why not concrete crack sealer? Great stuff isn't.