Landfill Liner
A landfill liner is the engineered barrier that keeps leachate from reaching groundwater. SIGMA supplies the full composite landfill liner system — HDPE geomembrane, geosynthetic clay liner and protective geotextile — for solid waste landfill base lining and capping, built for high tensile strength, puncture resistance and decades of containment.
Why HDPE geomembrane is the landfill liner of choice
As landfills become harder to engineer and leachate management grows more demanding, the HDPE geomembrane is increasingly the material of choice for difficult containment. High tensile strength, low thermal expansion and contraction, and high puncture strength let the liner survive aggressive subgrades and heavy waste loads. Welded into one continuous, impermeable sheet on site, the high density polyethylene landfill liner forms the primary barrier in the base liner system and a durable, UV-stable capping membrane over closed cells.
A composite landfill liner system, not a single sheet
Modern landfill liner design pairs the geomembrane with a geosynthetic clay liner (GCL) beneath it for redundant low-permeability protection, and a nonwoven geotextile cushion above and below to guard the membrane against puncture from the subgrade and the drainage gravel. Together these layers deliver the regulatory composite barrier that base-liner and final-cover specifications call for, while keeping installation fast and the long-term maintenance burden low.
Containment that lasts the life of the cell
Every component is produced from virgin polymer with carbon black and stabilizers for resistance to UV, weathering and chemical attack, so the landfill liner provides long-term containment assurance with minimal maintenance. SIGMA manufactures and exports the complete liner package — geomembrane, GCL and geotextile — direct from the factory, so you source one coordinated landfill liner system from a single supplier.
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Landfill liner FAQ
What is a composite landfill liner system?
A composite landfill liner combines an impermeable HDPE geomembrane with a low-permeability soil or geosynthetic clay liner (GCL) underneath, plus protective geotextile cushioning layers. The two barriers work together so that any defect in one is backed up by the other, which is what landfill base-liner regulations typically require.
Which geomembrane thickness is used for landfill liners?
Landfill base liners and caps commonly specify a heavier HDPE geomembrane grade for puncture resistance and long service life. The exact thickness depends on the waste type, slope and overburden in your design — send us the application and we will recommend a grade from our GRI-GM13 range.
Why add a GCL under the geomembrane?
A geosynthetic clay liner provides a second, self-sealing low-permeability layer. If the geomembrane is ever punctured, the bentonite in the GCL swells to limit leachate migration, giving the composite landfill liner the redundancy that single-barrier designs lack.
Do you supply the geotextile protection layer too?
Yes. We manufacture nonwoven geotextile cushion layers that protect the geomembrane from puncture by the subgrade and the overlying drainage stone. Sourcing the geomembrane, GCL and geotextile from one manufacturer keeps the landfill liner system compatible and the procurement simple.
Request a landfill liner quote
Tell us your cell area, the layers you need (geomembrane, GCL, geotextile) and destination port — we reply within one business day.