All concrete contains moisture and if the moisture level is too high it may cause the leveling compound to degrade over time.
Leveling concrete floor before epoxy.
Note the caps and bold.
Repeat until the surface of the concrete has a gritty etched texture.
A common misconception is that by applying a high build epoxy coating like a self leveling on uneven concrete the floor will magically become smooth and level.
This will not happen.
If you need to even out the surface before you apply the epoxy you could look into using self leveling cementitious compound.
Preparing to use self leveling concrete.
Before an epoxy coating is applied to the floor jon don highly recommends considering the following.
You run the risk of consuming a lot of product with absolutely nothing to show for.
Before you install your new floor there s an essential consideration you need to address and that s moisture in the existing concrete floor.
New slabs of concrete should be allowed to fully cure for 30 60 days before a coating is applied if a sealer was previously used on the concrete if water beads up on the surface do not use epoxy.
Other solutions could be grinding the substrate or using epoxy grout to fill the substrate unevenness.