LevelBond® is a premium self-leveling underlayment composed of Portland cement and unique chemical additions that when mixed with water creates a free-flowing mortar. LevelBond® will find its own level when poured and is designed to create a smooth, level surface for placement of floor coverings. LevelBond® is for interior use over concrete, exterior grade plywood (EGP), marble, terrazzo and ceramic tile as long as they have first been primed with LevelBond® PRIMER.