Layfield offers Enviro Liner® 4000 series geomembranes with surface texturing on one or on both sides. Texturing is accomplished by injecting nitrogen gas into the polymer of the surface layers of the geomembrane. When the geomembrane comes out of the die the nitrogen erupts from the surface creating a texture. By controlling the amount of nitrogen in the polymer and the thickness of the surface layers we can control the roughness of the texturing. Our textured Enviro Liner® 4000 series products are fully compliant with industry standards that specify asperity height (roughness) and material properties. Layfield is capable of supplying the friction and strength properties you require for any design challenges you may encounter. Layfield's Enviro Liner® 4000 is our standard LLDPE formulation which is ideally suited to backfilled applications. The flexibility of Enviro Liner® 4000 series products allow us to prefabricate them into large panels for fast and efficient installation.