Construction correction
The supplied product is laminated to a discrete 0.20 mm smooth PE membrane. It should not be described as polymer coated.
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GCL TECHNICAL DATAMANUFACTURING ROUTECETCO® / Minerals Technologies Inc.
AUSTRALIAN ROUTEKontain technical sales, quoting + project support
TECHNICAL DATA SHEET · AUSTRALIAN FORMAT
BENTOMAT® CL
0.20 mm smooth PE-membrane-laminated GBR-C
A reinforced sodium-bentonite GCL laminated to a flexible 0.20 mm smooth polyethylene membrane for fresh-water ponds and liquid-containment applications.
Kontain position
A smooth integral-laminate pathway where the project veneer is demonstrated as stable. It is a laminated product, not a polymer coating and not a field-welded geomembrane.
FORMATAustralian SI units
SOURCECETCO EMEA TDS, October 2018
STATUSKontain technical summary
ISSUED24 July 2026
PUBLISHED PERFORMANCE
Metric values, with the test conditions visible.
Values below are presented in Australian engineering units. CETCO’s published ASTM methods are retained; the units have changed, not the underlying test method or acceptance basis.
PE membrane0.20 mm smooth
Total mass4.10 kg/m² typical
MD / CMD tensile11 / 11 kN/m typical
Peel strength650 N/m typical
| Property | Published / specified value | Test method | MQC / published frequency |
|---|---|---|---|
| Hydraulic conductivityTDS statement; essentially impermeable membrane under the stated test | No measured flow | ASTM D5084 | Periodic |
| Total mass per unit area | 4.10 kg/m² typical | EN 14196 | 1 per 5,000 m² |
| Bentonite mass per unit areaReported at 0% moisture content | 3.60 kg/m² typical | EN 14196 | 1 per 5,000 m² |
| Tensile strength - MD / CMD-2.0 kN/m tolerance | 11 / 11 kN/m typical | EN ISO 10319 | 1 per 5,000 m² |
| Elongation at break - MD / CMD | 20% typical | EN ISO 10319 | 1 per 5,000 m² |
| CBR puncture resistance-0.2 kN tolerance | 1.8 kN typical | EN ISO 12236 | 1 per 5,000 m² |
| Peel strength | 650 N/m typical | ASTM D6496 | 1 per 5,000 m² |
| Finished thickness | 7.0 mm typical | EN ISO 9863-1 | 1 per 5,000 m² |
| Bentonite swell index | 25 mL/2 g typical | ASTM D5890 | 1 per 5,000 m² |
| Bentonite fluid loss | ≤ 18 mL | ASTM D5891 | 1 per 5,000 m² |
| Nonwoven geotextile mass | 200 g/m² | EN ISO 9864 | Supplier certified |
| Woven geotextile mass | 100 g/m² | EN ISO 9864 | Supplier certified |
| Smooth PE membrane thickness | 0.20 mm | EN ISO 9863-1 | Supplier certified |
| Typical roll | 5.0 m × 40.0 m | Manufacturer declaration | Continuous |
* Published typical peak value after hydration at approximately 9.6 kPa normal stress; not a minimum design envelope. † Published RESISTEX U20 ST maximum in deionised water and 0.02 M CaCl₂. Current factory certificates and project specifications govern.
DESIGN TRANSPARENCY
What still needs to be verified.
A compliant index value does not remove project-specific hydraulic, stability or installation risk.
Veneer gate
The CETCO design guide reports indicative soil-interface values for smooth CL geofilm. Confirm the actual critical interface at project normal stress, hydration and displacement; use CLT100 as a textured screening pathway where required.
Seam evidence
The CETCO guide reports large-scale overlapped CL seam testing and a 0.036 mm/day adopted design flux under stated assumptions. Field performance remains dependent on overlap continuity, bentonite enhancement, confinement and installation quality.
Method boundary
The supplied CL/CLT guide is for fresh-water ponds. Agree a project-specific chemistry and hydraulic evidence programme for saline, mining, waste or industrial liquids.
System boundary
The integral PE laminate lowers baseline flow but does not make the overlapped installation equivalent to a field-welded geomembrane.
SUPPLY + CUSTOMISATION
Quote the configuration the project actually needs.
Approximately 209 m² gross and 200 m² effective after standard overlaps. Confirm current factory dimensions, mass and origin for every order.
A budgeting assumption only. Final payload and pack plan require CETCO confirmation. Full production and freight lots generally support the strongest landed rate.
Alternative reinforcement and RESISTEX formulations can be evaluated where slope demand, adjoining interfaces or site liquid require a different configuration.
SOURCE + CONTROL
Kontain presentation. CETCO source data.
This webpage is a Kontain-prepared Australian presentation of CETCO published data. It is not a manufacturer reissue and should not be used to override a current CETCO TDS, certificate of analysis, project specification or engineering assessment.