I didn't want to be the bringer of negative news but, usually if the hardener don't "kick" it never will.....If you wait a couple of weeks, it could eventually dry?
That is a nice truthful demonstration however, as time goes on there will be those that will say, "the bottle went clean thru a CONCRETE WALL....HaHaHa
I'm enjoying watching too......We've picked names for the last couple decades as it seemed most of us just got tired of carrying home a full box of donate items. HaHaHa