SOLONAX manufactures the full geosynthetic range — HDPE and LLDPE geomembranes, nonwoven and woven geotextiles, geosynthetic clay liners, geogrids, drainage geocomposites and erosion control systems — to GRI-GM13, ASTM and EN specification, with every roll traceable to its extrusion lot.
Containment is never one product. Select a layer to see what it does and which part of the range serves it.
Specified together, manufactured together, shipped on one bill of lading.
HDPE · LLDPE barrier sheet, 0.50–3.00 mm
6 variantsSOLONAX GTNeedle-punched nonwoven & woven, 100–1 200 g/m²
5 variantsSOLONAX GCLNeedle-punched sodium bentonite barrier, k ≤ 5 × 10⁻¹¹ m/s
4 variantsSOLONAX GGUniaxial, biaxial and triaxial reinforcement, 20–1 000 kN/m
4 variantsSOLONAX DCGeonets, drainage geocomposites and prefabricated vertical drains
5 variantsSOLONAX GCHDPE cellular confinement, 50–200 mm cell depth
5 variantsSOLONAX WSPVC-P · TPE joint waterstop to DIN 18541, 190–500 mm
6 variantsA first-pass polymer and thickness recommendation derived from GRI-GM13 minimum values. It informs a specification; it does not replace project design.
Thickness steps follow the 0.75 / 1.00 / 1.25 / 1.50 / 2.00 / 2.50 / 3.00 mm production range. Minimum values are GRI-GM13 for HDPE and GRI-GM17 for LLDPE, scaled to nominal thickness. Cushion mass is a survivability estimate for the stated subgrade, not a design calculation.
The same six families, specified differently for each duty.
Heap leach pads, process solution ponds, tailings storage facilities, waste rock dumps, haul roads and closure caps.
Double-sided textured HDPE for interface friction on pad slopes, GCL as a secondary barrier under the primary liner, and drainage geocomposites in the solution collection layer.
Municipal and hazardous landfill base lining, leachate lagoons, capping and closure, landfill gas collection and contaminated land capping.
The classic composite: GCL, 1.50–2.00 mm textured HDPE, cushion geotextile and a drainage geocomposite in the leachate collection layer.
Potable and raw water reservoirs, irrigation ponds, canal lining, dam upstream faces, treatment lagoons and stormwater attenuation.
Smooth HDPE where the subgrade is prepared, GCL where the reservoir must hold water without a synthetic liner exposed, and geotextile cushion under rock armour.
Road subgrade stabilisation, asphalt reinforcement, railway trackbed and ballast protection, airport pavements, embankments over soft ground and retaining structures.
Biaxial and triaxial geogrid to cut base course thickness, woven geotextile for separation, and uniaxial geogrid in reinforced soil walls.
Secondary containment for tank farms, frac and brine ponds, refinery bunds, biogas lagoons and floating covers, coal ash impoundments and solar farm civil works.
Chemical resistance governs: HDPE for hydrocarbons, polymer-enhanced GCL for brine, and a leak location survey before commissioning.
Irrigation ponds, farm reservoirs, shrimp and fish ponds, silage clamps, slurry lagoons and greenhouse water storage.
Smooth HDPE at 0.75–1.00 mm, welded on site, with an anchor trench detail and a UV-stable exposed specification.
Published test frequencies, a retained sample from every lot, and a roll number that resolves all the way back to the resin.
| Property | Test method | MQC frequency |
|---|---|---|
| Thickness / asperity height | ASTM D5199, D5994, D7466 | Every roll |
| Density | ASTM D1505 / D792 | Every 90 tonnes |
| Tensile properties | ASTM D6693 Type IV | Every 9 tonnes |
| Carbon black content | ASTM D4218 | Every 9 tonnes |
| Carbon black dispersion | ASTM D5596 | Every 20 tonnes |
| Tear and puncture | ASTM D1004, D4833 | Every 20 tonnes |
A geomembrane fails at its weakest square metre, not at its average. Everything below exists so that the weakest square metre is still inside specification.
Challenge · A 1V:2.5H pad slope with 60 m of stacked ore required an interface friction angle the smooth liner specified at tender could not deliver.
Solution · 2.00 mm double-sided textured HDPE with a 400 g/m² cushion and a biplanar solution collection geocomposite, verified by project-specific direct shear testing.
Outcome · Slope stability re-verified at 1.42 factor of safety; zero destructive seam failures across 14 200 m of weld.
Challenge · Gypsum-bearing subgrade with a dissolution risk, and a client requirement for a double barrier without doubling the excavation.
Solution · GCL secondary barrier directly on the prepared subgrade, 1.50 mm smooth HDPE primary, and a 300 g/m² separator beneath the cover soil.
Outcome · Leak location survey after first fill recorded no detectable defects over the lined area.
Challenge · A regulator requiring a composite base liner with demonstrable equivalence to one metre of compacted clay, on a site with no clay borrow within 90 km.
Solution · GCL plus 2.00 mm textured HDPE, a 600 g/m² cushion and a double-sided drainage geocomposite in the leachate collection layer.
Outcome · Equivalence accepted on index flux data; 41 000 m³ of clay haulage removed from the programme.
A specification review before tender costs nothing and usually changes something.