Jay, that's why I suggested just 100 degrees. Rather than use tape or any kind of silicon, look on line at www.digi-key.com
. They sell shrink tubing large enough to go around even the large coils. Most vinyl tape is not all-weather and should be avoided. If you do use tape, use Scotch 33+. Look at Graybar or some other good supply house and you'll find it in widths up to 2".