Alucobond is a composite product consisting of a thin layer of aluminium on each side of a polyethylene core. The polyethylene core is what gives the material its flexibility and reduced weight. The aluminium on each side is coated to allow for digital printing. This material is vastly superior to traditional sign white (colourbond) panelling. Expressway Signs & Printworks uses a 0.15mm skin thickness on general signage and 0.3mm on architectural. Both materials come with product warranties. People should be wary of other companies using similar material. It is common practise for the aluminium skin thickness to be reduced to less then 0.15mm. This material is cheaper, has no product guarantee and is easily susceptible to damage.