Seaman Corporation's XR-5 Geomembranes are the strongest, most durable geomembranes in use today. XR-5 was first engineered over 30 years ago to be a high-strength, chemically resistant membrane best suited for high temperatures and broad chemical resistance applications, including acids, oils and methane. XR-5 is non-degradable with extreme puncture and tear resistance, as well as dimensional stability under high loads and temperature fluctuations.