Watch as the Veradek Corten Steel Window Box Planter naturally develops a rich patina finish over time, adding charm to outdoor spaces like the windowsill or balcony. Its thick gauge corten steel construction ensures that rust develops on the surface of the planter ensuring the structural integrity of the planter body for years of use. In addition, all corten steel series planters are equipped with styrofoam insulation to help keep plants healthy in both hot and cold extremes. Veradek corten series planters are proudly designed in Canada so you can be confident that your planter will hold up against weather related cracking and splitting. With the ideal balance of design, structure and purpose, the Corten Steel Window Box is the finishing touch needed to add a pop of color to your home. During the initial rusting phase, rust will drip from the surface of the planter. Veradek recommends placing an appropriate protective barrier between the planter and ground to ensure no stains are left behind.