- The Aluminium component of the coating provides a tough physical barrier between the external atmospheric conditions and the inner core of steel.
- The Zinc in the coating sacrifices itself to protect the steel at cut edges.
The rich colours of OPTIMA PLUS® add vitality to any building project and the double-coating delivers on durability too. OPTIMA PLUS® is produced by a unique process whereby rolled steel is continuously hot dipped into a patented alloy of 55% Aluminium, 43.5% Zinc and 1.5% Silicon. This patented coating protected the steel in two ways: