Definition
A soft, pourable material — usually a silicone rubber, epoxy, or similar resin — applied around electrical connections, wire bundles, or sensitive components to seal them, support them mechanically, and protect them from moisture, vibration, and contamination. Once applied, it cures into a solid or rubbery mass that holds the protected items in place.
Plain English
A pourable goo that hardens into a protective seal around wires or electrical parts, keeping them safe from moisture, shaking, and dirt.
Context Anchor
Seen in aircraft maintenance, especially around sealed electrical parts, sensors, ignition components, connectors, and some radio or instrument equipment.
Derivation
From the verb 'to pot,' meaning to place something into a container and fill around it. The compound is poured (or 'potted') into a cavity around the part being protected, much like setting a plant in soil inside a pot.
Why Pilots Care
It prevents electronic failures that could affect instruments, radios, or flight controls, directly supporting safe and reliable aircraft operation.
Intuition Check
Do not think of “potting” as planting something in soil. In aircraft maintenance, it means surrounding an electrical part with a hardening protective material.
Example Sentence 1
The technician applied potting compound around the connector pins to seal them against moisture.
Example Sentence 2
After soldering the new sensor, the mechanic applied potting compound to hold the wires securely against engine vibration.