High-molecular-weight PE protects fiber-optic cables, particularly in submarine networks. Used in shallow waters with additional steel reinforcement, while deep-sea cables rely solely on a. Polyethylene is a common plastic used for insulation in electrical cables due to its excellent electrical properties, durability, and resistance to moisture and chemicals. These cables are used in various applications, including power distribution, telecommunications, and data transmission. Mouser offers inventory, pricing, & datasheets for Polyethylene (PE) Fiber Optic Cables. Available in Multimode or Singlemode of 10G. This thermoplastic material is referred to as PE, or occasionally the more specific compounds MDPE (medium density polyethylene) and HDPE (high-density.