Kontain HDL-GCL · Australia-based project supply
PE-laminated geosynthetic clay liners combine a polyethylene film with a bentonite clay barrier in one factory-made product. Choose the film, carrier construction and bentonite formulation around the lining design.
Two PE film options
HDL-GCL 020
A thin PE film bonded to the GCL cover nonwoven. Use the specified direct GCL contact and PE overlap detail. Do not extrusion-seal this film.
Available with either bentonite formulation and all four base constructions. Neither option is wedge weldable.
Enquire about HDL-GCL 020 →HDL-GCL 050
A thicker PE film bonded to the GCL cover nonwoven. Manufacture and any extrusion-sealing procedure require qualification for the actual film, filler and assembly.
Available with either bentonite formulation and all four base constructions. Neither option is wedge weldable.
Enquire about HDL-GCL 050 →The film is specified by resin type and nominal thickness. GM13/GM17 compliance is not declared for this thin-film range.
Four base constructions
Standard grades use a woven carrier. Heavy Duty grades add a nonwoven to form a composite carrier. Both use a cover nonwoven of at least 200 g/m². Dry bentonite mass excludes polymer, geotextiles, adhesive and PE.
| Construction | Dry bentonite minimum | Carrier minimum | Formulation and film |
|---|---|---|---|
| Standard 37 | ≥3,700 g/m² | 100 g/m² woven | U or P; 0.20 or 0.50 mm LDPE |
| Standard 40 | ≥4,000 g/m² | 100 g/m² woven | U or P; 0.20 or 0.50 mm LDPE |
| Heavy Duty 37 | ≥3,700 g/m² | 300 g/m² composite (100 woven + 200 nonwoven) | U or P; 0.20 or 0.50 mm LDPE |
| Heavy Duty 40 | ≥4,000 g/m² | 300 g/m² composite (100 woven + 200 nonwoven) | U or P; 0.20 or 0.50 mm LDPE |
U identifies sodium bentonite granules without polymer addition. P identifies polymer-modified sodium bentonite powder. The full grade code identifies the selected carrier, clay loading, formulation and film.
Compare the layer sequence
These terms describe related lining products and systems, but they do not establish the same construction or performance. Check how the polymer barrier is applied, which face carries it, and how the joints are formed.
A film is bonded to the geotextile-backed clay liner. Kontain HDL-GCL uses LDPE film bonded to the cover nonwoven, with released longitudinal edge zones for the overlap detail.
PE-coated GCL products can use an extrusion-applied polymer layer. Extrusion coating and bonding a film are different manufacturing processes; confirm the exact layer, adhesion and seam requirements when comparing a coated GCL.
For HDL-GCL, the PE film and bentonite GCL form the combined barrier product. A “composite carrier” specifically describes the woven and nonwoven base within a Heavy Duty grade.
A composite liner can also comprise a separate geomembrane placed over a GCL. That arrangement has its own interfaces, membrane seams, protection and construction QA requirements.
Review complete lining systems →A bonded thin PE film does not automatically replace a separately specified geomembrane or meet a landfill lining specification.
Hydration and exposure
Consider the granular U formulation where compatible, low-salinity rainwater or subgrade moisture hydrates the bentonite. Review the actual contact liquid, hydration sequence and confinement.
Consider the P formulation where higher drying resistance is sought during prolonged exposure before covering, or lime-affected water, highly saline water or certain leachates may hydrate the clay instead of typical rainwater. Verify the actual liquid and formulation.
Polymer modification does not automatically qualify aggressive liquids or lime-treated fill. Cover promptly; permanent exposed service requires separate design. Source and formulation declarations identify the material supplied.
The TDS values are specified supply requirements, with the stated methods and qualifications. Independent qualification of each finished laminate remains pending. Refer to the project specification and the stated qualification requirements.
At designated longitudinal joints, maintain at least 300 mm direct GCL contact beneath a separate 300 mm PE overlap. A 400 mm released film zone is specified at those edges. End joints, field cuts, penetrations and repairs require the issued detail.
Technical resources · 7 files
Current laminated GCL technical data sheets, product range guide and installation guidance. Choose the bentonite formulation and film thickness, then confirm the complete grade code.
0.20 mm LDPE; Standard 37/40 and Heavy Duty 37/40.
Revision H · 5 November 2026 · 1 pageDownload PDF ↓Technical data sheetLaminated GCL 020 · Granular sodium bentonite · no polymer addition0.20 mm LDPE; Standard 37/40 and Heavy Duty 37/40.
Revision I · 5 November 2026 · 1 pageDownload PDF ↓Technical data sheetLaminated GCL 050 · Polymer-modified sodium bentonite powder0.50 mm LDPE; Standard 37/40 and Heavy Duty 37/40.
Revision H · 5 November 2026 · 1 pageDownload PDF ↓Technical data sheetLaminated GCL 050 · Granular sodium bentonite · no polymer addition0.50 mm LDPE; Standard 37/40 and Heavy Duty 37/40.
Revision I · 5 November 2026 · 1 pageDownload PDF ↓Product guideLaminated GCL product rangeCarrier, bentonite mass, formulation, film and joint requirements.
Revision M · 5 November 2026 · 3 pagesDownload PDF ↓Installation guide · PDFGCL installation guideUnlaminated Standard and Heavy Duty U/P grades and laminated HDL-GCL 020 / 050.
Issue 1 Rev 8 · 5 November 2026Download PDF ↓Read onlineGCL installation guidanceHandling, soils, direct GCL contact, film overlaps, cover and construction quality assurance.
Issue 1 Rev 8 · 5 November 2026Open resource →Ponds · mining · containment · capping
Send the area, slopes, subgrade source, hydration water or liquid analysis, cover programme, joint requirements and delivery location. Kontain can help compare the laminated GCL and composite liner options around the project specification.
