Paul Ryan of the DIY Network shows how to make concrete countertops for the kitchen. Concrete is now available in a wide range of colors and textures. First build forms out of 3/4-inch melamine (a waterproof smooth material for easy casting), according to the blueprints. Use caulk to fill the seams and create a rounded corner to the concrete. Clean the form with rubbing alcohol. Mix the concrete according to the instructions, then fill the form with the concrete. Rub a power sander on the edge of the form to vibrate and release any air bubbles. Run a piece of wood over the top of the form to remove excess concrete, then cover it with plastic and let it cure for 10 days. Disassemble the form. Use optional stain to add depth and texture. Then the countertop is ready for DIY installation.