Copper and Aluminium – the „golden” advantage of a precious alliance. TECU® Gold, the new copper and aluminium alloy for façade cladding, will soon after installation begin to develop a very elegant matt brown-golden appearance reminding of gold in a very specific way.  Façade solutions in TECU® Gold give buildings a discreet value image. Depending on the incidence of light on façade surfaces, a fascinating, unequalled play of colours can be witnessed.