The concrete yard area has sunk/pulled away from the pool coping (the part of attached to the pool and level with ground) in large strips leaving as much as 1.5" gap in some places. The old mastic filler is shot. What material(s) are recommended to used to fill the gap and then be covered by new mastic?
We want to prevent underground seepage under the pool. We're on top of a hillside to the street below and would like to retain the view than be part of it.
Brand names suggestions on filler and mastic would be helpful.