Hi all, I have a very rough uneven concrete garage floor, I’ve tried using a floor levelling compound a couple of years ago but it’s started to lift and break up in places? Not sure if this is due to the fact that I didn’t use a pva before laying it? I’m now looking at removing all of it and starting again, what should I use, I need something that’s going to stand upto normal garage work ie using car jacks etc, any ideas...