Conductive Fabric is a great product. Insulating methods are time consuming and do not help the conductive fabric blend in with the fabric.
The easiest solution is to use nail polish to insulate.
Step 1: Iron on the Conductive Fabric Onto the Fabric
Step 2: Paint the Nail Polish Onto the Conductive Fabric
Get to the edges of the conductive fabric and coat 3-4 layers to get complete insulation