K5 offers a full range of PVDF paint options that replicate the appearance of naturally weathering metals, such as steel, copper, and zinc. While rusted metal has become widely used in architecture, it comes with many dangers and risks. Rusting metals can corrode, leading to leaks. K5's PVDF coating provides lasting protection to the aluminum substrate. Natural rust can drip from roofs and run down walls, staining the surrounding materials and sidewalks. With K5 there is no rust, so there is no staining.