The steel water heater undergoes chemical processing which, combined with the special enameling method using vacuum technology, achieves perfect mechanical adhesion. Then the special glass-based enameling (DURO GLASS), the result of long-term research and testing by ELCO, is baked together with the steel at 860°C, achieving perfect thermochemical adhesion. Thus, the glass faithfully follows the contractions and expansions of the metal, having the same elasticity limits as it.
Result: The water heater is fully protected from rust.