they ALL have one think in common. They will not work if you need it thick. Most only work for about 1/4 inch max.
MOST, I repeat MOST levelors are to repair dents, or blems that go into the surface and your trying to achieve levelness at that point.
When your raising a floor to a higher degree, this just will not work to your intentions.
Consider creating a level flooring with wood over the concrete.
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