Sakrete Self-Leveling Underlayment is a polymer-modified Portland cement based self-leveling underlayment for interior applications up to 1 inch in a single pour. For use over properly prepared concrete and plywood floors. Can be used under ceramic tile, stone, carpeting, VCT, wood flooring and other materials. Not designed as a direct wearing surface. May also be used to encapsulate radiant heating installations.. This item has been restricted from sale in the following state (s): []