The steel water heater undergoes a chemical treatment which, combined with the special enameling method using vacuum technology, acquires perfect mechanical adhesion. Then, the glass-based special enameling (DURO GLASS) is baked together with the steel at 860°C, acquiring perfect thermochemical adhesion. Thus, the glass follows closely the contractions and expansions of the metal, having the same limits of elasticity as it.
Result: The water heater is fully protected from rust.