Construction
KGCL-C is laminated—not polymer coated. A discrete 0.20 mm PE geofilm is laminated to the nonwoven upper face; the woven carrier remains on the underside of the bentonite GCL.
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GCL TECHNICAL DATAMANUFACTURING ROUTEPrivate-label manufacturing partner
AUSTRALIAN ROUTEKontain GCL Systems
TECHNICAL DATA SHEET · AUSTRALIAN FORMAT
KGCL-C
Kontain value-engineered PE-geofilm-laminated GCL
A reinforced sodium-bentonite GCL laminated to a discrete 0.20 mm polyethylene geofilm on the upper nonwoven face, with a bentonite core and woven carrier on the underside.
Kontain position
A cost-led laminated option for higher-head or liquid-containment applications where an integral PE geofilm is preferred. Overlaps and detailing still govern system performance.
01PE geofilm laminate — upper face0.20 mm supplied
02Nonwoven upper geotextile≥ 200 g/m²
03Sodium bentonite core≥ 3.7 kg/m² dry
04Woven underside carrier≥ 110 g/m²
FORMATAustralian SI units
SOURCESupplier TDS dated 2 July 2026 + Kontain KGCL-C supply specification
STATUSPreliminary product comparison
ISSUED23 July 2026
PUBLISHED PERFORMANCE
Metric values, with the test conditions visible.
GRI-GCL3 Rev. 5 defines a geofilm as a polymeric film no thicker than 0.25 mm. Because KGCL-C is laminated to a discrete 0.20 mm PE film above the nonwoven cap, it is treated as a reinforced geomembrane/geofilm-related GCL—not as a polymer-coated-geotextile GCL. Supplier values and contractual GRI-based acceptance requirements are distinguished below.
PE laminate0.20 mm supplied
GRI categoryReinforced GM/GF-related
Dry bentonite≥ 3.7 kg/m²
GCL tensile≥ 8 kN/m specified
| Property | Published / specified value | Test method | MQC / published frequency |
|---|---|---|---|
| Nonwoven upper geotextile massKontain minimum / GRI-GCL3 minimum | ≥ 200 g/m² | ASTM D5261 | 1 per 20,000 m² |
| Woven underside geotextile massKontain minimum; GRI-GCL3 minimum is 100 g/m² | ≥ 110 g/m² | ASTM D5261 | 1 per 20,000 m² |
| PE geofilm thicknessSupplier construction / GRI-GCL3 reinforced GM-GF category | 0.20 mm supplied; ≥ 0.10 mm GRI minimum | ASTM D5199 | 1 per 20,000 m² |
| PE geofilm densityGRI-GCL3 minimum; current-film evidence required | ≥ 0.92 g/cm³ | ASTM D1505 / D792 | 1 per 20,000 m² |
| PE geofilm break tensile — MD and XMDGRI-GCL3 minimum; current-film evidence required | ≥ 2.5 kN/m | ASTM D882 | 1 per 20,000 m² |
| Bentonite swell indexSupplier / GRI-GCL3 minimum | ≥ 24 mL/2 g | ASTM D5890 | 1 per 50 tonnes |
| Bentonite fluid lossSupplier / GRI-GCL3 maximum | ≤ 18 mL | ASTM D5891 | 1 per 50 tonnes |
| Dry bentonite mass per unit areaSupplier / GRI-GCL3 minimum | ≥ 3.7 kg/m² | ASTM D5993 | 1 per 4,000 m² |
| Dry total composite mass per unit areaGRI-GCL3 minimum; current-composite evidence required | ≥ 4.1 kg/m² | ASTM D5993 | 1 per 4,000 m² |
| Moisture contentSupplier maximum; tighter than the 35% GRI-GCL3 maximum | ≤ 12% | ASTM D5993 | 1 per 4,000 m² |
| GCL tensile strength — machine directionKontain minimum; GRI-GCL3 minimum is 4.0 kN/m | ≥ 8 kN/m | ASTM D6768 | 1 per 20,000 m² |
| Peel strength — machine directionSupplier / GRI-GCL3 minimum | ≥ 0.36 kN/m | ASTM D6496 | 1 per 4,000 m² |
| Geofilm durability after oven ageingGRI-GCL3 minimum after 50 days at 60°C; current-film evidence required | ≥ 80% tensile retained | GRI-GCL3 §5.6.4 / ASTM D5721 + D882 | Yearly |
| Finished-GCL hydraulic conductivity / index fluxGRI-GCL3 lists D5887 permeability and index flux as not applicable to the GM-GF-related category | Project-specific requirement | Project-agreed method | Project specification |
The supplier sheet identifies the 0.20 mm PE laminate and GCL-core properties. The film exceeds the 0.10 mm GRI-GCL3 minimum for a geofilm, but classification is not conformance: density, MD/XMD break tensile, dry composite mass and aged film retention must still be evidenced in the current factory MQC report.
DESIGN TRANSPARENCY
What still needs to be verified.
A compliant index value does not remove project-specific hydraulic, stability or installation risk.
GRI classification
At 0.20 mm, the PE layer is a geofilm under GRI-GCL3 and KGCL-C is assessed in the reinforced GM-GF-related category. The separate GT polymer-coated category does not describe this construction.
System boundary
KGCL-C is a geofilm-laminated GCL, not a welded geomembrane. Overlap continuity, penetrations, wrinkles, uplift, cover placement and confinement remain active design issues.
Evidence gate
The present supplier sheet does not by itself establish full GRI-GCL3 conformance. Require the current MQC plan and report covering the incoming PE film, geotextiles, bentonite and finished GCL, plus order traceability and project conformance testing.
Hydraulic evidence
Do not transfer the KGCL-ST D5887 hydraulic-conductivity value to KGCL-C. GRI-GCL3 does not prescribe D5887 permeability or index flux for the GM-GF-related category; the project must define suitable composite-barrier evidence.
SUPPLY + CUSTOMISATION
Quote the configuration the project actually needs.
The reference roll is 30 m long. Roll length is customer-selectable, subject to factory roll mass, lifting, handling and transport confirmation.
Kontain can nominate panel length to suit pond geometry and reduce end joints. Gross and effective areas are recalculated for the approved order length.
Current film and GCL MQC results, certificate of analysis, roll and lot traceability and an agreed conformance plan are required before release.
SOURCE + CONTROL
Kontain presentation. Supplier source data.
This webpage combines the manufacturer-supplied GCL core and PE-laminate data with Kontain's KGCL-C construction and MQC acceptance requirements. The manufacturing source and current factory evidence will be disclosed during technical approval and before order release. KGCL-C is not a CETCO product.