UPDATE FIGURE 1 A 60-mil (1.5-mm) EIA/ KEE geomembrane for a secondary containment application with a soil cover Uses and applications While a variety of flexible vinyl applications were initially pursued using KEE, geomembranes are the first commercial use for KEE. Performance after direct contact with aggressive fluids was a good way to demonstrate and confirm the resistance of KEE to plasticizer migration in harsh environments. As a result of the excellent geomembrane performance in exposed applications, single-ply roofing products with KEE were subsequently introduced. This has resulted in significant penetration of exposed roofs for commercial structures. Strengths KEE plasticizers/polymers enhance the characteristics of other resins by making them more durable, more flexible and 10 Geosynthetics | June July 2019 longer lasting. Typical benefits of KEEblended materials include: * Improved performance under conditions in which a liquid plasticizer would migrate, such as outdoor exposure to weather or contact with chemicals. As a result, EIA or EIP geomembranes are being used for hydrocarbon and diesel containment applications. * Increased melt strength for thinner parts, improved foam cell structure and increased thermoforming temperature window, which has facilitated welding individual sheets of EIA geomembranes. * Reduced scrap and higher yields through improved flow and fusion characteristics, which allows for lower processing temperatures and a wider processing window for rigid PVC resin/materials.