Stop in for a cup of coffee

I've had success with spray foam. Critters don't seem to eat it. I also put wire mesh over the end of the drain line to limit entry.
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.