Dermax MS or “microseal” is a refractory-surfacing product especially developed for protecting Silicon Carbide Electric Heating Elements, widely employed in electric furnaces.

Silicon Carbide heating elements make a perfect operational solution for electric furnaces, working at high temperatures and quick cycles.

One of the problems, however, is that despite the fact that even though Silicon Carbide exhibits ideal refractory properties, it may be easily oxidized at high temperatures, causing substantial performance reduction for the heating element.

The problem occurs because Silicon Carbide oxidizes forming “free” silica, which not only changes the element’s resistivity but causes expansions and deformations in the structure, generating more tension on the body of the element and leading to the premature “death” of the ceramic resistor.
Silicon Carbide deterioration is more intense depending on the presence of reactive gases and that requires the elements to be more often replaced, making the whole process less efficient and more expensive.

Dermax MS has been developed to fight that problem and increase the efficiency of the elements that work at quick cycles.

Dermax MS is a protective shield based on Silicon Carbide and sintering components, which is applied to the surface of the new element. The coating shield protects against the action of destructive and highly reactive agents such as corrosive gases, commonly generated inside the furnaces, increasing lifetime up to three times.

Inside the Dermax MS coating shield, Silicon Carbide grits work encapsulated by a semi-vitrified film, which wraps all the resistive surface of the element. The protective coat of Silicon Carbide works just like the element itself as if it was part of the resistor.

Dermax MS must be applied to new elements only, before assembly on the furnace and requires that certain application parameters be followed at risk to obtain optimum performance and lifetime.