the original coating; problem now is that as that's started to tear that much at that spot, i think it will tear off completely.is that the original coating or later torch on?
I've used the below on concrete coves at the edges of roofs
Bostik Rito Waterstop 14kg
Rito 14kg Waterstop Liquid : Bostik Rito Waterstop is a versatile, high performance waterproofing liquid and is suitable for waterproofing roofs and walls, blocks, founwww.woodies.ie
not a permanent permanent solution, and as foul a smelling thing as I've ever applied to anything else.