When the sun hits your windows, it reflects light off the glass, making it appear bright and clean. When you apply the same principle to your door, you can achieve the same look. Here’s how. Apply a light layer of wax or silicone to the top of the door. This will allow the sun’s rays to bounce off the surface, leaving it looking shiny and new. Wax is a great option if you want to use a sealant that won’t leave behind any residue. Silicone, on the other hand, is a flexible substance that can be applied with no residue. If you prefer a sealant that requires a bit of elbow grease, apply a coat of polyurethane to the top of the door. The key to keeping your door looking new is to reapply the sealant every few months. Make sure to protect the sealant from the elements by applying it to a large, clean section of the door.