There was an old rag and some very old concrete around this water supply line entering the house. I would like to reseal it, but I am not sure what to use.

copper water supply line

Should I use hydraulic cement or something more flexible?

  • I would use concrete colored silicone or any silicone would be fine. I would very carefully chip away that mortar on top and fill with silicone or other flexible caulk. – Jim Stewart Sep 13 '18 at 23:46
  • If there is any chance you might damage the pipe in chipping the mortar, then just put calk where you can. – Jim Stewart Sep 14 '18 at 1:05
  • Thank you. I plan to pick up a new tube of silicone today to fix it. I was able to chip away the old mortar. – Jay P. Sep 14 '18 at 15:28

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