Mapei's 4 gal. Pail Planiseal® Max Polymer-Based Moisture-Control Membrane and Textured Primer delivers reliable performance on interior concrete substrates where excessive moisture can compromise flooring installations. Once cured, it forms a durable, bonded membrane that supports long-term flooring system integrity while helping reduce installation failures caused by moisture-related issues. Ideal for use in renovation and new construction, it integrates into modern flooring systems as a critical moisture mitigation layer that supports consistent, professional-grade results.