CETCO (Colloid Environmental Technologies Company) is the construction technologies segment of Minerals Technologies, Inc (NYSE: MTX). CETCO offers solutions for commercial, industrial and infrastructure construction challenges worldwide. End markets range from waterproofing, green roofing, sediment remediation, vapor intrusion to lining and capping. We provide expertise in transforming minerals and polymers into technologies that improve productivity and performance. From technical problem-solving to on-site supervision, we consult with customers to develop long-term solutions.

Company details

Business Type:
Industry Type:
Soil and Groundwater
Market Focus:
Globally (various continents)
Year Founded:
Over 1000
$100,000,000 US - $1,000,000,000 US

CETCO provides high-performing products worldwide across a broad range of construction projects, including bentonite-based waterproofing for underground structures and drilling applications including foundation, slurry wall, tunneling, water well, and horizontal drilling. It also provides industry-leading environmental solutions for containment and remediation of pollutants, including groundwater treatment, solidification and stabilization, and sediment remediation for commercial, industrial and infrastructure construction.

CETCO is the world-leading supplier of state-of-the-art Geosynthetic Clay Liner (GCL) technologies, like its Resistex® line, for industrial, hazardous and municipal solid waste landfills, mining sites, and for containment of challenging residues such as coal ash from coal-fired electrical generation and red mud from alumina processing. 

CETCO also offers vapor intrustion mitigation products as well as remediation products, including the groundbreaking FLUORO-SORB, an adsorption media for the remediation of PFAS.

The lining technologies business unit of CETCO has been a leading manufacturer of geosynthetic clay liners for 30 years.

We offer a full range of engineered environmental liner systems including geosynthetic clay liners, pond liners, drainage geocomposites, geotextiles and bentonite soil sealants.

In addition to offering high quality products, CETCO provides unparalleled engineering support. Our technical staff is expertly trained in specification review and can offer testing or design assistance. Additionally, CETCO maintains a full library of technical resources to assist you on your next project.

Expand beyond traditional lining technologies and find out how CETCO geosynthetic clay liners can help you.

CETCO lining products are often used in the following applications:

  • Landfills
  • Mining Facilities
  • Power Utilities
  • Stormwater Basins
  • Wetlands
  • Canals
  • Secondary Containment
  • Wastewater Lagoons
  • Agricultural Operations
  • Engineered Remedial Barriers


Landfill Liners & Caps

GCLs have become the gold standard clay component of composite lining systems used in industrial, hazardous and municipal solid waste landfills. Used alone or in combination with a geomembrane in a composite cover system, GCLs provide significantly lower permeability, improved ease of installation, an increased amount of usable space.  In many cases GCLs are more cost-effective than traditional compacted clay liners.  GCLs are also not subject to deterioration from differential settlement and freeze-thaw cycles, which can damage traditional compacted clay liners. Important design considerations for GCLs in landfill caps include confining pressure, and potential for ion exchange and desiccation.



Geosynthetics are used in construction of various components of modern mining facilities, including process solution ponds, heap leach pads, stormwater containment, wastewater treatment ponds and closures. Harsh environmental conditions provide a challenge to engineers designing the projects. In addition, increasing environmental and cost pressures are requiring lining systems to achieve greater performance levels than ever.  GCLs are rapidly becoming a desired component of mining liner systems because of the benefits they provide in cost effective construction, environmental compliance and process solution leak reduction. In weather-sensitive remote or high-altitude locations, GCLs offer far greater installation efficiencies than compacted clay.


Coal Combustion Residuals Disposal

Coal combustion residuals (CCR) are generated during the power generation process and can include fly ash, bottom ash, boilerslag, and flue gas desulfurization (FGD) residuals. CCRs contain trace concentrations of heavy metals and therefore cannot be dumped or stored where rainwater can leach the metals. Liner systems can be used to contain the coal combustion by-products and protect them from leaching into the environment.



GCLs can be used for decorative ponds, golf course water features, fish ponds, water reservoirs, and wastewater lagoons. Their self seaming installation requires no specialized equipment, and their self-healing characteristics promote long life and high performance.


Secondary Containment

GCLs can be used around and underneath secondary containment above ground petroleum storage tanks.  of above ground storage tanks and are easy to install. Installation details and penetrations are easily handled using simple installation techniques and can be quite cost effective.


Canals, Stormwater Impoundments and Wetlands

Composite laminated GCLs offer puncture and tensile strengths beyond conventional geomembranes. These GCLs offer the low permeability of a geomembrane combined with the high swelling and self healing characteristics of a traditional GCL. With their ease of installation, cost-effectiveness and resilience to physical and climate issues, GCLs are often specified in canals, stormwater impoundments or wetlands to control seepage and conserve valuable water where native soils are too permeable.


Highway and Civil

GCL can be used in highway and civil applications such as at airport de-icing facilities used to remove ice build up on the surfaces of planes. During the application process, glycol-based de-icing fluids can leak into local stormwater runoff, potentially causing pollution. CETCO GCLs were found compatible with de-icing fluid (glycol diluted 50/50 with water). GCLs can also be used to line roadway drainage swales for containment and prevent excessive percolation, thereby minimizing potential for groundwater contamination. Another example of using GCL in civil and highway applications is using the liner to contain acid rock and prevent runoff from entering the local water supply.