Hi I'm laying 8m of LVP in my hall and to level it I used 5 bags of Ardex NA. It's the first time of done this and im not a floorer so there are a couple of small dips of 1- 2mm deep 20cm ish circumference. I placed a plank on top and there is a tiny bit of vertical movement when I stand on it. I know the correct thing is to get another couple of bags of NA and add another layer on top but my missus is getting restless for me to finish so i'd prefer not to do that. Does anyone have any suggestions as to how to patch a small dip? I thought about maybe dry cement but will that create dust for years to come? Any suggestions appreciated. Regards 'DS