HDPE-Coated Geosynthetic Clay Liners
HDPE-coated GCLs combine a bentonite composite with an additional polymer barrier layer. We supply and install the selected lining system for containment projects that require this specific barrier construction.
Also referred to as composite GCL liners or geomembrane-backed bentonite liners, HDPE-coated GCL systems provide enhanced barrier performance for critical containment infrastructure.
Product Structure
Eurobent GCL CS consists of:
Upper layer: High-strength woven geotextile
Core: Natural sodium bentonite with high swell index
Lower layer: Nonwoven geotextile
Laminated barrier: HDPE, LLDPE or PVC geomembrane, thermally bonded to the nonwoven side
📌 The geomembrane layer enhances the GCL’s barrier properties while protecting the bentonite from desiccation, chemical attack, and root intrusion.
Compliance & Standards
ISO 10318-1: Geosynthetic Clay Liner - GBR-C
ASTM D5887 / D5890 / D6102 test methods
Conforms to global environmental containment guidelines
Installation Support Across Africa
Geosynthetics South Africa offers full installation, welding, and QA/QC services for GCL CS across Southern, West, Central, and East Africa. With experience in diverse geotechnical environments - from gold and lithium mines to infrastructure mega-projects - we ensure every liner is installed to international quality standards.
Typical Applications
Landfill basal liners & capping systems
Tailings dams & leachate ponds
Tunnel waterproofing and cut & cover projects
Industrial water reservoirs
Concrete structure waterproofing (foundations, slabs)
Mining pads and stockpile containment
Irrigation canals and water conveyance systems
Why Geosynthetics South Africa?
🔷 Local partner with continental reach
🔷 Engineering-led liner solutions
🔷 Partnerships with global manufacturers
🔷 Extensive mining, infrastructure & environmental project references
🔷 End-to-end service: supply, logistics, installation, QA/QC
Applications and uses
We supply and install this product for:
- Landfill base lining and capping as part of an approved barrier system.
- Water-containment and environmental lining where bentonite compatibility and confinement are established.
Why choose HDPE-Coated Geosynthetic Clay Liners?
- Combined bentonite and polymer barrier layers
- Containment and capping systems
- Supply and specialist installation
Installation and technical guidance
Design and procurement inputs
Check the contained liquid and hydration water, confinement, slope stability, overlap details and protection against premature hydration. A coated GCL must be selected and detailed as its specific product system.
Provide the product grade or performance specification, drawings or BOQ, quantities, site location and required date. We will define supply, delivery and any agreed installation and QA/QC responsibilities in the quotation.
Request a product-specific quotation →Installation and QA/QC
Record material identity, subgrade release, panel positions, overlap inspections, repairs and cover placement.
Use the current supplied-product procedure and the approved project inspection plan. Define responsibilities and acceptance criteria before installation.
SELECTION · SPECIFICATION · PROJECT SUPPLY
Choose the right specification
Select the GCL construction for the designed barrier and the site’s hydraulic and chemical conditions.
- Confirm exact construction, bentonite requirements and any additional membrane layer.
- Review liquid chemistry, confinement, subgrade, overlaps, penetrations and cover requirements.
- Agree handling, exposure and hydration controls using the supplied-grade installation procedure.
Define the quality records
Record material identity, subgrade release, panel positions, overlap inspections, repairs and cover placement.
For a useful quotation: send the grade or performance specification, quantity, location, required date and scope. Availability, delivery and installation responsibilities are confirmed in the quotation.
Why Geosynthetics South Africa
One enquiry coordinates the specified product, technical submission, delivery and any agreed installation and QA/QC scope. We define quantities, programme, responsibilities and handover requirements against your project.
Related product systems
Applications
Related case studies
Installation & quality
Industries
Product documents and additional links
HDPE-coated geosynthetic clay liners
Composite barriers for engineered containment
Our geosynthetic clay liner (GCL) systems deliver ultra-low permeability containment using reinforced sodium bentonite technology designed for demanding civil, mining, water, and environmental infrastructure applications across Africa.
Global brands
GSE geomembranes, MIRAFI geotextiles, Tensar geogrids and Eurobent GCLs, supported by grade-specific technical documentation.
Supply & installation
Product supply, site delivery, fabrication and specialist installation coordinated to the project specification and programme.
Documented QA/QC
Material traceability, installation inspections, applicable testing and handover records defined for the agreed scope.