ZMan67S said

I figured plumbers used something like that. I was picking up the landscape stuff at Mernards the other day and asked.
They had some concreate mix crap. I mentioned a foam spray and they had no clue. Remember what you used??
I have to paint the pipes first before I seal them. Ya I know a little anal...like it to look nice.

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WV64Signet said

Great Foam, depending on the gap size there are varying "recipes" on expansion. If you decide on caulk or concrete injection I'd put some backer rod in and top off. I find that caulk is less effective on wider gaps or vertical surfaces.

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