If you live in a cold climate or are trying to do this in the winter, you should also use a heat gun or hair dryer to warm the surface, transfer tape and mylar as you use the roller. Don't get carried away with the heat, as you can easily damage the mylar and/or wing if you get things too toasty. Sometimes I also go back over the bond after a couple of days with the heat gun and roller. Don't melt the safety tape.