Geo-Synthetics, Inc. (GSI)

Geo-Synthetics, Inc. (GSI)

What we offer you at GSI is simple – a solution you will not find anywhere else. We have worked hard to excel as a leader in the erosion control, environmental and transportation industry. GSI stands the test of time and surpasses all others in experience, service and product offerings.

GSI is nationally known and respected as a full-service distributor, fabricator and installer of geo-synthetics and erosion control materials. What sets us apart is our level of expertise and our custom fabrication capabilities. Plus we carry a wide assortment of geosynthetics to fit virtually any application. Behind every GSI product and service is a promise to deliver you the best our industry has to offer.

Company details

2401 Pewaukee Road , Waukesha , Wisconsin 53188 USA
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Business Type:
Service provider
Industry Type:
Market Focus:
Nationally (across the country)
Year Founded:

This company also provides solutions for other industrial applications.
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You have an advantage with GSI because we are the only company in the industry that provides convenient service through complete warehousing, distribution and fabrication. Our warehouses have large-scale inventories located strategically in key areas throughout the U.S. Plus our cutting, sewing and rerolling capabilities let us tailor products to fit your exact needs and specifications.

Prompt attention is another quality you will appreciate at GSI. In addition to our well trained customer service professionals at our office locations, we have sales experts that live within their designated territories. This means that whatever your needs are or wherever your site is located, GSI is close by to serve you.

Our experience lies in the more than 100 million square feet of geomembrane and geotextile solutions we have installed from coast to coast. With GSI, you can rely on expert project management, accurate estimating and the best geosynthetic installation reputation in the industry. Our nationally recognized installation crews strive to be on time, anywhere you need them.

Geomembranes and geotextiles are ideal for containment, waste management and seepage control. GSI offers a wide range of materials that have been extensively researched, tested and proven for long-term use in primary or secondary application.


Geo-Synthetics, LLC (formerly Surface Maintenance Systems) construction division was founded in 1971. The company's primary business was asphalt repair and seal coating. In 1974, services were expanded to include the installation and distribution of paving grade fabrics manufactured by a well known geotextile supplier. In 1980, an affiliate, Geo-Textile System, Inc. was formed to distribute a full line of geotextile fabrics and erosion control products.

As the geosynthetic distribution market grew in 1986, the construction division began installing geomembranes in addition to paving fabrics. The main focus of the geomembrane division is to supply, fabricate and/or install PVC, High Density Polyethylene, XR-5 and Polypropylene liners. In the geomembrane construction division we have combined experience in excess of 140,000,000 square feet of membranes.

Whether it be geotextile fabrics, erosion control, concrete accessories, building products or geomembrane installation, we have more than 120 employees in our operations to service the needs of our customers.


Geo-Synthetics, LLC has offered quality geo-solutions since 1971. We have worked hard to excel as a leader in the environmental industry and have stood the test of time, surpassed by no one in experience, service, and product offerings.

Geo-Synthetics, LLC (GSI) is recognized and respected as a full-service company, offering distribution, fabrication, and installation services nationally. GSI is one of the nations largest independent installers of geosynthetic materials, giving us the ability to source specification compliant materials from select leading manufacturers.

Our 30 years + installation experience, refined installation techniques and materials purchasing expertise combine to offer our clients unmatched geosynthetic product solutions on a supplied and installed basis. Behind every GSI product and service is a promise to deliver you the best our industry has to offer.


GSI has established solid working relationships with the industry’s leading suppliers and has positioned itself to be able to procure the most technically advanced geosynthetic materials currently available. GSI's client list has traditionally included general contracting firms, engineering companies, private owners and government agencies at all levels, located coast to coast in the United States operating in a wide range of industries. We have provided installation services in the waste management, power and energy, civil construction, pulp and paper, oil and gas, aquaculture, agriculture, and mining markets.