Gundle/SLT Environmental, Inc. (GSE) is a leading manufacturer and marketer of geosynthetic lining products and services with a worldwide presence in the following markets: agriculture, aquaculture, canals, civil, golf courses, mining, power, sportsfields, stormwater retention, waste containment, wastewater, and other industrial applications.

For over 30 years, people around the world have looked to GSE products to make their projects easier and better. With an expansive line of geomembranes, geosynthetic clay liners, geonets, geocomposites, nonwoven geotextiles, concrete protection, and replicated grass turf products, GSE continues to develop solutions to meet our customers varying project requirements.

Our unstoppable commitment to innovation, creating new technologies and products, gives our company the ability to apply our technologies to an endless array of customer needs. GSE’s dedicated and experienced professionals are always ready to service our customers around the world.

Headquartered in Houston, Texas, GSE has manufacturing and sales offices in the United States, Canada, Chile, Germany, United Kingdom, Thailand, and Egypt. GSE is a subsidiary of GEO Holdings Corp. owned by Code Hennessy & Simmons IV L.P.