is colorbond roof rustproof
1 Aluminium and aluminium alloy gutterings such as Zincalume and Colorbond are light-weight and corrosion proof. 2  It comes in a wide range of powder-coated finishes, making it easy to find a colour that matches or complements your house and roof colours. Aluminium and aluminium alloy gutterings such as Zincalume and Colorbond are light-weight and corrosion proof. 2  It comes in a wide range of powder-coated finishes, making it easy to find a colour that matches or complements your house and roof colours.