Clean the floor thoroughly
Remove dust, grease, paint, and loose debris
Repair cracks and holes with a concrete patch compound
Grind down high spots with a concrete grinder
Check the floor level with a long straightedge or laser level
Mark low spots and uneven areas
Apply a concrete primer if required by the leveling product
Mix a self-leveling compound according to the manufacturer’s instructions
Pour the compound onto the floor
Spread it with a gauge rake or trowel
Use a spiked roller to remove air bubbles if needed
Let the compound flow and settle
Allow it to cure fully
Sand or grind any minor imperfections after curing
Install flooring only after the surface is dry and level