The IP65 shaft seal option on the SM and Neometric motors is not field upgradable. A special tool is used to put the seal on the motor and gaskets must be installed in the connector housing.
SM and Neometric motors with the the MS, TQ, or GS connection option with the optional "-V" shaft seal are IP65 rated.
IP65 is defined by NEMA standards as:
"Water projected by a nozzle against the machine from any direction shall have no harmful effect."