(Note: I contacted a moderator explaining why this was a valid question.)

Si se desea una traducción más descriptiva: gel hidrófugo para cables / fibras.

En ambos casos, se refiere al material repelente al agua con que se rellenan cables que van a ser tendidos enterrados o sumergidos. La explicación más detallada está en el artículo sobre "Icky-pick" en Wikipedia, copiado en parte más abajo.

Normalmente el material es "petroleum jelly": petrolatum, white petrolatum, soft paraffin, or multi-hydrocarbon.
Si se desea citarlo en detalle, hay que buscar cómo se denomina en el lugar de localización de la traducción: petrolato, vaselina, etc. (referencia: https://en.wikipedia.org/wiki/Petroleum_jelly )

Nota: "jelly cable" se refiere al cable completo.

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"A critical concern in outdoor cabling is to protect the fiber from damage by water. This is accomplished by use of solid barriers such as copper tubes, and water-repellent jelly or water-absorbing powder surrounding the fiber. "
https://en.wikipedia.org/wiki/Fiber-optic_cable


"Icky-pick or icky-pic is a name for a gelatinous substance or filler contained within outdoor-rated communications cables, including both twisted pair copper cabling and fiber optic cabling.
PIC is the abbreviation for Plastic Insulated Cable. The cable is filled with an "icky" substance. The filled cable itself, therefore, is called an "Icky PIC".
Icky-pick has two primary functions:
Deter animals from biting and damaging the cable due to the smell and taste of the gel
Seal any nick or gash in the outer jacket if they do bite it, preventing water from entering the cable and damaging it by corrosion and freeze expansion
The actual icky-pick compound is a very thick petroleum-based substance e.g. petroleum jelly with very high flammability, and consequently is only rated for outdoor use, frequently direct-buried in the ground. "
https://en.wikipedia.org/wiki/Icky-pick