If you want to use Reflectix on your windows, you will first measure the area where you would like to place them, then cut your Reflectix according to the measurements. After doing so, put up your window shades and secure them using durable, quality duct tape. Most projects using this reflective insulation wind up feeling like the inside of a low-budget spaceship because of the bright material called Reflectix. So, if you want a more aesthetic look for your space, the combination of patterned cloth, adhesive spray, and black duct tape may be the ideal answer. These window shades not only look fantastic on the inside, but they also block off almost all outside light. Also, they can help make it hard to see inside, so you can sleep comfortably and privately anyplace you parked. Here is how you can use Reflectix on your windows: Tools and Supplies: Large Cardboard Sheets Insulation Reflectix Your Chosen Fabric Spray Adhesive Maximum Durability Black Duct Tape Squares of Velcro Adhesive Heavy-duty scissors Tape measure Marker Follow these steps: Prepare Your Window Shades Using your tape measure, measure the length and height of a window. Next, cut a cardboard piece an inch or two larger than those dimensions since cutting away extra material is more manageable than taping it back. Load your cardboard piece, heavy-duty scissors, and permanent marker inside your vehicle. Next, position the cardboard against the inside of the glass. Make a mark that is a bit smaller than you believe you should take off a corner, then remove it. Repeat this step until the cardboard fits snugly into the recessed area of the window. a. Note that it is vital that they are snug if you want the window blinds to stay in place. Trace the cardboard onto the Reflectix, then make a larger cut out of it. Next, insert the Reflectix piece into the same window and trim for a snug, uncrinkled fit. Repeat steps one to three for each window. But, to save time, you can trace your initial window shade and cut it out slightly larger, then trim to exact size. After cutting all the window blinds to size, spray the outward-facing side with matte black spray paint. But, to avoid spraying paint on the wrong side, you must place each piece in its window and mark the exterior as you remove it. Then, let the paint dry completely. You can skip step six, but I strongly advise you to do so because it will make sleeping in your vehicle much more discreet! Also, covering all of your windows in reflective silver will make your vehicle stick out like a sore thumb, so spray-painting will help you solve that problem. Put Up and Secure Your Window Shades Spread out your patterned fabric roll and place all window shades on the fabric with the black side up, considering pairs of windows and the direction the pattern is going on each piece for when you put them up in your windows. Trace each window shade onto the cloth and cut out all fabric pieces using a permanent pen. Next, apply your adhesive spray onto the silver side of the window shade and wait until it becomes tacky. Then, stick and push the corresponding fabric piece in place. To fix the cloth, wrap it with maximum strength duct tape, hot-dog style, around the borders of the window shade. Then, align each piece of duct tape with the preceding part on the fabric side to make it look good. If you use high-quality duct tape that is sturdy and compatible with your materials, you can stop with the process and enjoy your newly ut-up window shades. But, if you got cheap, knock-off duct tape, you must do more to ensure that your window shades are secure. If your duct tape starts to peel up, what you can do is get the duct tape extremely hot using your iron to help it cling better. But, make sure that you put a scrap piece of fabric between the iron and the tape to prevent it from burning.