CONEC Sealed D-subs are not just a standard connector with ‘sealant’ added as an after-thought. This is an engineered product, providing the user with a ready-to-install connector, which : a) seals the connector-to-panel joint, b) seals connector-to-connector when mated to make it electrically functional even when wet, not just a protection for the box contents, and c) seals the path thru the connector in the event of liquid exposure when not mated.