Mylar tape is a type of polyester film tape that is commonly used for cable insulation wrapping. It is a thin, strong, and flexible material that provides excellent electrical insulation properties. Mylar tape is often used in high-voltage applications, as well as for general-purpose insulation and wrapping.
Water blocking tape, on the other hand, is a type of tape that is used to prevent water from entering the cable. It is typically made of materials that can absorb or repel water, and is used to create a barrier around the cable to prevent moisture from getting in. Water blocking tape is commonly used in outdoor or underground cable installations, where the cable is exposed to water or moisture.