Australian basis
This is an Australian-market product TDS. Confirm the final factory, current revision, roll mass and order-specific certificate rather than substituting a family-level BENTOMAT value.
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GCL TECHNICAL DATAMANUFACTURING ROUTECETCO® / Minerals Technologies Inc.
AUSTRALIAN ROUTEKontain technical sales, quoting + project support
TECHNICAL DATA SHEET · AUSTRALIAN FORMAT
BENTOMAT® DNW40-AU/GP2
Australian scrim-reinforced double-nonwoven GCL
A reinforced Australian-market GCL with sodium bentonite between a scrim-reinforced nonwoven carrier and a nonwoven cap, needlepunched for internal reinforcement.
Kontain position
The strongest general Australian starting point in the supplied CETCO data where 4.00 kg/m² minimum dry bentonite, dimensional stability and 600 N/m minimum peel are useful.
FORMATAustralian SI units
SOURCECETCO Australian TDS, November 2023
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.
Dry bentonite≥ 4.00 kg/m²
Index flux≤ 9.0 × 10⁻⁹ m³/m²/s
Peel strength≥ 600 N/m
Typical roll5.0 × 40.0 m
| Property | Published / specified value | Test method | MQC / published frequency |
|---|---|---|---|
| Index fluxCertified maximum | ≤ 9.0 × 10⁻⁹ m³/m²/s | ASTM D5887 | 1 per 25,000 m² |
| Hydraulic conductivityCertified maximum | ≤ 5.0 × 10⁻¹¹ m/s | ASTM D5887 | 1 per 25,000 m² |
| Dry total mass per unit area | ≥ 4.40 kg/m² | ASTM D5993 | 1 per 4,000 m² |
| Dry bentonite mass per unit area | ≥ 4.00 kg/m² | ASTM D5993 | 1 per 4,000 m² |
| GCL moisture content | ≤ 35% | ASTM D5993 | 1 per 4,000 m² |
| Tensile strength - machine direction | ≥ 4.0 kN/m | ASTM D6768 | 1 per 20,000 m² |
| Peel strength | ≥ 600 N/m | ASTM D6496 | 1 per 4,000 m² |
| Bentonite swell index | ≥ 24 mL/2 g | ASTM D5890 | 1 per 50 tonnes |
| Bentonite fluid loss | ≤ 18 mL | ASTM D5891 | 1 per 50 tonnes |
| Montmorillonite content | > 70% | XRD | 1 per batch |
| Bentonite durability flux at 35 kPa0.05 M CaCl₂ after DI-water hydration; result available on request | ≤ 1 × 10⁻⁷ m³/m²/s | GRI-GCL3 §5.6.1 / ASTM D6766 | Yearly |
| Nonwoven cap mass | ≥ 200 g/m² | ASTM D5261 | 1 per 20,000 m² |
| Scrim-nonwoven base mass | ≥ 200 g/m² | ASTM D5261 | 1 per 20,000 m² |
| Base and cap geotextile durabilityAfter 50 days at 60°C; result available on request | ≥ 65% tensile retained | GRI-GCL3 §5.6.2 | Yearly |
| 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.
Interface gate
The double-nonwoven construction is intended to support interface friction and dimensional stability, but no catalogue angle replaces ASTM D5321 testing with the actual adjoining materials.
Durability evidence
The TDS identifies yearly bentonite and geotextile durability testing. Request the current results with the project evidence pack.
Installation
Use the CETCO installation guide and project details for product orientation, overlaps, granular bentonite, cover and hydration controls.
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.