Why Cables Are Filled With Goo

Outdoor communication cables are packed with a strange, sticky gel to keep water out. Technicians affectionately call this substance icky-pic because of its messy, jelly-like texture.

This gooey compound acts as a crucial barrier inside fiber-optic and copper lines. If moisture enters a cable, it can corrode the wires or damage fragile glass strands. The gel fills every tiny gap, preventing water from traveling through the line and causing short circuits. While it is certainly unpleasant to handle, this simple slime keeps our modern global internet running reliably during storms.