LevelQuik RS is a premium, calcium aluminate based, high quality self-leveling underlayment that achieves greater than 4300 psi compressive strength and incorporates low-prep technology. LevelQuik RS levels floors prior to the installation of ceramic tile, natural stone tile, resilient flooring, carpet, wood and other floor coverings. This quick setting underlayment can be applied up to 1.5" (3.8 cm) thick in one pour and seeks its own level in minutes. Formulated to have excellent compressive strength, LevelQuik RS may be applied in residential structures with floor joists up to 24" (61 cm).