Once your wax mixture is at the proper temperature, and you have thoroughly mixed in any additives, pre-heat your container to about 150 degrees F. In the photo we are using a heat gun. However, pre-heating can also be done in the oven on the lowest heat setting. If you are using a heat gun, exercise some care as heat guns can get much hotter than 150 degrees F.

Note: This step is not absolutely necessary, but it does improve the finished product. It permits us to pour our wax at lower temperatures without trapping bubbles and it improves the glass adhesion.