Brine pools and their surrounds are also subjected to chemical exposure from minerals and salts. The waterproofing and installation systems used in these areas must be resistant to these. As a rule, the concrete construction as well as the cementitious levelling layers are protected by these waterproofing and installation systems against water aggressive to concrete. The optional use of a conductive strip and conductive lacquer between primer and the waterproofing membrane gives the possibility of a non-destructive test for impermeability of the membrane using a spark coil test to DIN 55670 under high voltage. The time consuming and costly test via a 14-day trial filling of the pool with water can be dispensed with.