The primary means to a hermetic seal is to eliminate the lustful factors within your psychology.
Any time you remember your Inner Being, any time your prayers are saturated with the purest aspirations, you are directing your energy to your Being.
Of course you should use the invocations and conjurations to help you (see:
https://gnosticteachings.org/courses/defense-for-spiritual-warfare.html ), but the primary thing is always how you direct your energy.
There is no magical way to make yourself chaste. The only solution is psychological death.