Electrically conductive coatings have been applied for cathodic protection (CP) of steel in concrete with varying success since 1989. Principal challenges to long-term performance and reliability proved to be oxidation of the electrically conductive pigment and the acid produced at the anode/concrete interface during the operation of the conductive coating in the anode mode. Oxidation will lead to loss of electrical conductivity, and the anodic acid produced leads to delamination of the conductive coating. Both processes lead to the loss of cathodic corrosion protection. By using appropriate graphite pigments, oxidation is negligible, as was shown in an extended R&D project conducted from 2012 to 2015 by IBAC (RWTH Aachen, Germany) and BAM (Berlin, Germany). The detrimental effects of acid production at the anode/concrete interface proved to be more challenging to overcome. One successful concept was the creation of an acid-resistant micro-capillary matrix at and near the anode/concrete interface, which was applied for the first time in 1998 at a parking deck in Oslo. The concept of the micro-capillary matrix is based on the formation of a micro-capillary matrix by impregnation of the concrete adjacent to the anode/concrete interface with an alumo-silicate binder that forms acid-resistant zeolite-like structures that act as a sponge that pulls the alkaline concrete pore solution towards the anode/concrete interface neutralizing the anodically produced acid. Evaluation of laboratory scale probes by ESEM/RDX revealed the formation of zeolite-like structures in the concrete pore space; references are cited in the paper. Electrochemical evaluation proved that long-term current densities of 35 mA/m2 and short-term current densities of >100 mA/m2 are supported without loss of performance. Since 1998, the CAS Composite Anode has been applied in 96 projects protecting the steel in concrete in parking decks, road and highway bridges, seaside apartment buildings, concrete basins of swimming pools, concrete retaining walls, and marine civil structures. Performance data of laboratory scale evaluations and examples, as well as performance data of selected field projects in the Netherlands (parking decks, seaside apartment buildings) and Germany (parking decks), are presented.