ACTFLEX 929 HV is a Class III high performance, tough, root resistant, highly flexible polyurethane waterproofing membrane for use in internal and external under tile and non-exposed applications. ACTFLEX 929 HV is a single component membrane which cures by reaction with the atmospheric moisture to give a tough elastomeric waterproof membrane. It is supplied as a thixotropic liquid which is easily applied at the recommended thickness to both vertical and horizontal surfaces.