After ~2 hours of brining, strain out the liquid from the radish and lightly rinse in water to remove the extra saltiness. You want a balanced taste of salt and sweet.
Strain it to remove excess water
When the rice flour paste has been cooled, combine it with the rest of the marinade
Into a large bowl, add the radish cubes and the marinade sauce
Mix it well until all radish cubes are well coated in the marinade. It's easier to do this using your hands. Can use gloves.
Add the radish cubes into a clean air-tight container.
When adding the radish into the container, press it down to release any air bubbles. Do this until you've put all the radish into the container and press the top.
Leave some room on the top for the kimchi to expand.
Leave the kkakdugi in room temperature 1-2 days to ferment, depending on the room tempeature. If it's cold, I leave it out at room temperature 2 days. If it's warm like summer time, I leave it at room temperature 1 day.
Place it in the refrigerator. Depending on your taste preference, let it ferment from 2 weeks to a month before trying it.