Geomembrane Liners
An extensive range of engineered geomembrane liner systems - from HDPE tailings containment to reinforced floating covers - available as material supply or complete supply, installation and QA/QC under one accountable partner. We supply, install and certify HDPE, LLDPE, rLDPE, EPDM, rPP, PVC, EVA and CSPE geomembrane liner systems across 30+ African countries - from 0.5 mm irrigation lining to 3.0 mm TSF base liners. Every project runs on one integrated scope: design assistance, material supply, IAGI-aligned installation by certified crews, on-site seam testing and a full signed QA dossier. We are one of only 5 IAGI Installer Members on the continent.
| About Geomembrane Liners
Geomembranes are ultra-low-permeability synthetic membrane barriers - the critical last line of defence between a contained fluid or waste mass and the surrounding environment. Manufactured from virgin polymer resins formulated with carbon black, antioxidants and UV stabilisers, they are engineered to perform across Africa's harshest conditions: extreme UV exposure, aggressive mine chemistry, differential settlement, and temperature swings from sub-zero to 60 °C.
At Geosynthetics Africa, geomembranes are never simply product. They are the foundation of a containment system - and a system is only as reliable as its weakest link. That is why we control liner selection, design, supply, installation, seam testing and QA sign-off as a single engineered scope. No fragment handovers. No procurement gaps. One contract, one crew, one signed QA dossier.
| Common Applications and Engineering Use Cases
Tailings Storage Facility Lining
Geomembrane barriers for tailings containment, including composite and double liner systems with leak detection.
Read MoreHeap Leach Pad Lining
Geomembrane lining for leach solution containment and recovery beneath ore stacks and process ponds.
Read MoreReservoir & Dam Lining
Lining systems to control seepage in agricultural dams, reservoirs and process water storage.
Read MoreLandfill, Ash & Bund Lining
Geomembrane barriers for landfill cells, ash facilities and secondary containment bunds.
Read MoreIrrigation Canal Lining
HDPE and LLDPE geomembrane lining to reduce seepage losses in irrigation canals.
Read More| Properties & Specifications
| Property | Test Method | Value |
|---|---|---|
| Thickness | ASTM D5199 | 0.5 mm – 3.0 mm (product dependent) |
| Density / resin grade | ASTM D1505 | Virgin polymer only - no regrind |
| Tensile yield stress | ASTM D6693 | Per GRI-GM13 / GRI-GM17 minimum |
| Break elongation | ASTM D6693 | HDPE ≥100% · LLDPE ≥400% |
| UV stability (OIT retention) | ASTM D5885 | ≥35% after UV exposure (ASTM D5721) |
| Carbon black content | ASTM D1603 | 2.0 – 3.0% (HDPE / LLDPE) |
| Stress crack resistance | ASTM D5397 (SP-NCTL) | ≥300 hours (HDPE) |
| Seam peel / shear strength | ASTM D6392 | On-site destructive test - every project |
| Types of Geomembrane Liners
HDPE Geomembranes
The continental benchmark for permanent containment. Highest chemical and UV resistance, 50–100 year buried service life. Specified for TSF, heap leach pads, landfill base liners and canals. Available smooth and textured (single/double). GRI-GM13 certified. 0.75 mm – 3.0 mm.
LLDPE Geomembranes
Superior flexibility and elongation (400–700%) for differential settlement, complex geometries and flexible cover applications. Preferred for agricultural dams, reservoirs and poor subgrade conditions. GRI-GM17 certified. 0.75 mm – 2.5 mm.
rLLDPE Geomembranes - Floating Covers
Scrim-reinforced LLDPE engineered specifically for floating cover applications on slurry ponds, TSF water recovery dams, effluent ponds and biogas digesters. Standard liners fail in this application - rLDPE is specified for a reason. Project-sourced; contact us for lead times.
EPDM Geomembranes
Vulcanised synthetic rubber with unmatched UV and ozone resistance - no carbon black required. NSF/ANSI 61 certified for potable water contact. Specified for drinking water reservoirs, exposed long-term pond liners and cold-climate applications. ASTM D4637. 1.0 mm – 1.5 mm.
CSPE Geomembranes
Thermoset liner for applications where HDPE's chemical resistance ceiling is not enough - concentrated acids, alkalis, oxidising reagents and aggressive industrial dosing environments. ASTM D5019. 0.9 mm - 1.4 mm
EVA Geomembranes
Retains flexibility at sub-zero temperatures and bonds directly to cementitious substrates - the specification for concrete reservoir lining and rehabilitation, and cold-region water infrastructure. 1.0 mm – 2.0 mm
PVC Geomembranes
Highly conformable and cost-competitive for short-to-medium service life applications. Irrigation channels, farm dams, tunnel waterproofing and ornamental ponds. Not recommended for long-term exposed or high-chemical environments. 550gsm - 1200gsm
fPP Geomembranes (flexible Polypropylene)
Unreinforced flexible polypropylene combining the chemical resistance of HDPE with the conformability of LLDPE - and significantly better flexibility at low temperatures than either. Highly resistant to stress cracking, UV degradation and a broad chemical spectrum. Specified for landfill containment, water storage and applications requiring both chemical resistance and flexibility without reinforcement. GRI-GM13 / GRI-GM18 certified. 0.75 mm – 2.0
| Benefits of using Geomembrane Liners
Proven impermeability
Geomembranes achieve permeability values as low as 10⁻¹⁴ m/s - several orders of magnitude lower than compacted clay. They provide a reliable, testable barrier that compacted earthworks alone cannot match, and their integrity can be verified seam-by-seam before handover.
Long service life
Properly specified and installed geomembranes last decades - HDPE liners buried in stable conditions carry rated service lives of 100+ years. Exposed EPDM and rPP systems consistently deliver 25–40 years without liner replacement, dramatically reducing lifecycle containment costs.
Chemical and UV resistance
Geomembranes are formulated to resist the specific chemical, thermal and UV conditions of their application - from concentrated mine reagents and leachate to prolonged direct sun exposure. The correct liner type eliminates degradation as a failure mode for the design life of the structure
Cost-effective containment
A geomembrane system typically costs a fraction of an equivalent engineered clay liner - and installs faster, with a smaller environmental footprint and no dependence on suitable on-site clay material. For remote African project sites, this difference is significant.
Verifiable quality
Unlike compacted clay or earthworks, geomembrane seam integrity is directly testable - every weld can be pressure-tested and documented before cover placement. This gives project owners, engineers and regulators an auditable record of containment quality that no other liner system can provide
Adaptable to any project geometry
With liner types ranging from rigid HDPE to highly elastic LLDPE and elastomeric EPDM, geomembranes conform to complex shapes, steep slopes, differential settlement and large unsupported spans - covering containment applications that rigid or earthen systems cannot practically address.
| Frequently Asked Questions about Geomembrane Liners
What is the difference between HDPE and LLDPE geomembranes?
Do you supply only, or do you also install?
Are your liners certified to GRI-GM13 and GRI-GM17?
Can you supply and deliver across Africa?
What is rLDPE and when is it used?
What thickness should I specify for a TSF liner?
| Specifications for Installing Geomembrane Liners
All Geosynthetics Africa geomembrane installations are executed to the following minimum standards. Project-specific CQA plans may impose additional requirements.
Subgrade: smooth, free of protrusions >12 mm, debris and standing water. Signed off by GSA QA supervisor before liner deployment.
Welding: dual-track fusion (wedge) welding for field seams; extrusion welding for repairs, patches and complex geometry. Daily trial welds on calibrated equipment before liner goes down.
Non-destructive testing: 100% of fusion seams air-pressure tested (ASTM D5820); 100% of extrusion welds vacuum-box tested (ASTM D5641).
Destructive testing: peel and shear samples to ASTM D6392 at minimum one per 150 m of seam, tested on-site.
Handover: full QA dossier, weld log, NDT results, destructive test reports, material roll log, panel as-built drawing and signed handover certificate - issued under Geosynthetic Africa's name.
| Benefits of Choosing Our Products
- One contract, zero gaps
- IAGI-aligned installation
- Pan-African supply and logistics
- Global materials, African specification
| Projects with Geomembrane Liners Across Africa
| Popular Geomembrane Liners in our Catalogue
A curated selection of best-selling geomembrane liners. View full specs, request a quote, or add to your BOQ — without leaving this page.
GSE HD Smooth Geomembrane Liner - GRI-GM13
GRI-GM13 and SANS 1526 certified smooth HDPE geomembrane from Solmax GSE, 1.0mm to 3.0mm, 100% virgin resin. The standard profile for flat and gently graded containment on slopes to 3H:1V - TSF base liners, landfill cells, reservoirs, canals and process ponds. 7m rolls. Ex-stock supply, IAGI-aligned installation and full QA dossier across 30+ African countries.
GSE HD Double-Side Textured Geomembrane Liner - GRI-GM13
GRI-GM13 certified HDPE geomembrane textured on both faces for maximum interface friction. Specified on containment slopes steeper than 3H:1V - TSF embankment faces, landfill side slopes and dam batters where veneer stability governs the design. 1.0mm to 2.5mm, 100% virgin resin, Solmax GSE manufactured.
GSE HD Single-Side Textured Geomembrane Liner - GRI-GM13
GRI-GM13 certified HDPE geomembrane textured on one face, smooth on the other. Specified where friction is needed against one interface only - typically textured to the soil or drainage layer with the smooth face against a GCL or secondary liner. 1.0mm to 2.5mm, 100% virgin resin, Solmax GSE manufactured.
rLLDPE Exposed Membrane - Floating Covers & Exposed Lining
Scrim-reinforced LLDPE membrane in FC45 (1.14 mm) and FC60 (1.52 mm), black/black or black/tan. For floating covers, exposed roof lining and permanently exposed containment where UV, biaxial stress and spanning loads govern. NSF/ANSI 61 certified for potable water contact.
GEOLINE HD500 – 0.5 mm Smooth HDPE Pond & Dam Liner
GEOLINE HD500 is a smooth 0.5 mm (500 micron) HDPE liner made from virgin resin with carbon black, antioxidants and stabilisers, for farm dams, irrigation reservoirs, aquaculture ponds and other low-risk water containment. In 5.8 m × 100 m and 7 m × 420 m rolls. Not for landfill, mining, tailings or chemical containment: those need 1.5 mm or thicker.
EVA Geomembrane - Concrete Reservoir & Tank Lining
EVALINER , an Ethylene vinyl acetate geomembrane in 1.5 mm and 2.0 mm, the most flexible of the polyolefin liners. For lining concrete reservoirs, thickener tanks and irregularly shaped liquid-retaining structures where conformance around complex geometry governs. Covered and internal applications.
GEOLINE LL - LLDPE Geomembrane Liner
Flexible LLDPE geomembrane liner in 0.50–2.50 mm (20–100 mil), smooth or textured, manufactured to GRI-GM17. Built for settlement-prone subgrades, landfill caps, ponds and lagoons.
EPDM Geomembrane Liner 1.14mm
Non-reinforced EPDM rubber geomembrane, 1.14mm. Full-width roll, 278.98m². For exposed dams, reservoirs, ponds and tank lining.
GSE® HD Leak Location Conductive Geomembrane Liner - GRI-GM13
GRI-GM13 certified HDPE geomembrane with an integral conductive layer enabling Electrical Leak Location survey after installation - through cover soils and under water, without excavation. Specified for high-consequence TSF, hazardous waste cells and double-liner systems where post-installation leak detection is a regulatory or design requirement. 1.5mm to 2.5mm, available smooth or textured.
| Industries that use Geomembrane Liners
| Specsheets & Installation Guides
Download technical datasheets and step-by-step installation guides for Geomembrane Liners.
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