I don't know lLinds but it's Latex paint used for concreat floors. It would not be sold for floors if it washed off during cleaning.
Maybe it's only water soluble while it wet so that brushes and rollers can be cleaned and then when it's cured it's not soluble anymore. It really would make much sense to paint a floor and then wash it off everytime you cleaned the floor.
The paint I bought is Pittsburgh Floor, Porch and Deck 100% Acrylic Enamel.