Marathon Self-Fusing Tape protects irregular adapters such as Housing-to-Housing Coupling Connectors and Right Angle Connectors. It can also be used to repair damaged aerial or underground cable. The Marathon Self-Fusing Tape is a synthetic rubber compound formulated to bond to itself. As you stretch the tape, its memory will attempt to return to its original unstressed position, applying constant pressure onto itself. As it applies this pressure, it begins an immediate bonding process that unifies it into one solid piece.