Self-Leveling Compound (SLC)
A pourable cement-based compound used to level out an uneven subfloor before finish flooring installation.
Self-leveling compound is a fluid cement product that finds its own level when poured onto a subfloor. It's the standard fix for out-of-flat slabs and high-spot/low-spot wood subfloors that exceed the flooring manufacturer's flatness tolerance (typically 3/16" over 10 feet).
SLC is sold by the bag (typically 50 lb covering ~50 sqft at 1/4" depth). Pricing it as a per-sqft line item on the estimate keeps the math honest — material cost, labor cost, and primer/bonding agent should all be visible.
Schedule SLC as its own day in the crew calendar. Fresh SLC needs 4-24 hours to cure before any finish flooring goes down on top of it. Skipping cure time will trap moisture and cause delamination.