GSE Holding, Inc. manufactures and markets engineered geosynthetic lining products for environmental protection and confinement applications worldwide. The company offers geomembranes, including GSE high density polyethylene, GSE textured liners, GSE White, GSE Leak Location Liner, and GSE High-Temperature Liner, which are synthetic polymeric lining materials used as barriers in geotechnical engineering applications; and drainage products, such as GSE HyperNet, and GSE Tri-Planar that provide transmission avenues for liquid and gas collection, and leak detection systems. It also provides geosynthetic clay liners comprising GSE GundSeal and GSE Bentoliner, which are installed as the bottom layer of a liner system; and nonwoven geotextiles that are synthetic, staple fiber, and nonwoven needle-punched fabrics used in environmental and other industrial applications, such as filtration, soil stabilization, separation, and liner protection applications. In addition, the company offers specialty products, including GSE CurtainWall and GSE GundWall that are vertical barrier systems, which block the lateral migration of subsurface fluids; GSE StudLiner, a studded geomembrane that prevents corrosion and deterioration of concrete structures comprising tanks, pipes, drainage channels, and tunnels; and pre-fabricated products, such as pipe boots, corners, sumps, or other ancillary parts. Its geosynthetic products are used in mining, solid waste containment, liquid containment, coal ash containment, oil and gas, and other industrial and civil applications. The company serves general contractors; facility owners; distributors; engineering and civil works construction companies; and mining, power, and industrial companies. GSE Holding, Inc. was founded in 1981 and is headquartered in Houston, Texas. As of December 20, 2017, GSE Holdings Inc. operates as a subsidiary of Solmax International, Inc.