I don't know if this helps the OP as I don't know the products.
I'm just chiming in to say I know what they are trying to explain, as down here in perth australia it's very common.
The soil here is sandy and hydrophobic, water will not sink in at all, it just runs off. So there's lots of "soil wetter" treatments available here that we need to use in our gardens.
I also found that most potting mixes develop the same tendencies after a few months if you always let them get dry between watering. The water just flows between the soil and the pot and then straight out, the bulk of the soil stays dry. So I either had to use a soil wetting agent, or just put the pot in a deep saucer to let it bottom water for a few hours and gradually get moist again.
A lot potting mixes and treatment even include soil wetting agents or crystals in their composition because of this down here, I guess because of the local sand that's in the mix that is naturally hydrophobic.
Last season I used coco coir in my own mixes for the same reason, a permanent fix rather than treating with a soil wetting agent every few months, or bottom watering 30x large pots for a few hours each. Of course using coco coir bites me in the behind now when the pots are out in the rain and the plants are drowning and I want them to dry out...
So if you're worried Hadokan, either look up a soil wetting agent or bottom water the pots by sitting them in a deep saucer for a little bit.