Add the sunflower seeds to the Tapatio brine and mix them into the brine, coating all the seeds, making sure they are all wet, no dry clumps. Place a plate/lid on top of the seeds, that fits the gallon size container. This will help keep all the seeds submerged.
Over the next 48 hours, stir the seeds ever 6 – 8 hours, to make sure the seeds have contact with the Tapatio brine.