The 547 didn't want to budge on my floor when I used the additive. Had to use a damn angle grinder to get the bumps down bc I used an old lumpy mix & didn't do the right measurement ratio. Without the additive it has sort of a chalky finish, which doesn't bother me since it's going under stuff. The stuff I mentioned was the 549 which is called FeatherFinish but you have to level it yourself. For self-leveling, the Henry 555 seems to be what they recommend.