Flexible Electric Heating Strips of Silicone Rubber Heating Element. Custom Flexible Silicone Rubber Heater With Temperature Control supplied. Silicone Rubber Thermal Insulation Pad. Flexible Silicone Rubber Heater Heating For Industrial Use. Silicone rubber heating elements have two material, nickel chrome heating wire and etching foil. Both types are heating fast and high thermal conversion efficiency. Packed in PP Bag + Carton Box.