Used with dpm and primer in same range as a solution to repeated lifting tiles on a concrete floor. Following water leak we discovered no dpm and did not want to dig out the whole floor. This looks like it’s solved it as the leveller has dried completely silver/grey. That floor has never looked and felt so dry with dehumidifier running constantly! Made up with the finish. We’re fairly experienced diyers and found it easy to mix up and use. Don’t have a meter to measure how much damp was and is coming through, but after weeks of touching and walking on the damp concrete floor, I’m wondering whether to even bother tiling it as the finish is that good. To those not very experienced, it doesn’t level the floor, you have to put the effort in to do that, but it does finish the job by smoothing the float lines. Invest in a spiked roller, you’ll be glad you did.