Carbofol® + HDPE geomembrane: enhanced mining liner | Naue

Enhanced HDPE geomembrane for mining, landfill and critical containment.
Impermeable polymeric barrier (GBR-P). Extended OIT ≥ 200 min and HP-OIT ≥ 600 min resist chemical attack and UV.
Carbofol^® + 406 2.0 s/s GM13 (smooth) · 406 2.0 BF/TF GM13 (embossed slope liner).
Tensile at yield ≥ 29 kN/m · Puncture ≥ 535 N · Density ≥ 0.940 g/cm³.
CE (AVCP 2+) · GRI GM-13 · BAM · ISO 9001 · ISO 14001.

Carbofol^® + is an enhanced HDPE geomembrane for sealing in mining, landfill, and critical containment applications. You install it as a primary or secondary liner in base and slope sealing systems. It forms an impermeable polymeric barrier (GBR-P) against leachate, process liquids, and groundwater contamination. Its extended oxidation resistance delivers long-term liner integrity under demanding conditions.

Mining containment and hazardous waste landfills expose geomembranes to aggressive chemicals, high UV radiation, and extreme physical stress. Standard GRI GM-13 geomembranes may not provide sufficient oxidation resistance for these conditions. Carbofol^® + solves this with OIT ≥ 200 min (ASTM D8117) and HP-OIT ≥ 600 min (ASTM D5885), doubling the GM13 baseline values.

Roll format 120 m × 7.5 m reduces the number of field welds significantly compared to 5.0 m standard rolls. Fewer welds mean lower installation cost and fewer potential failure points. Extended oxidation resistance lowers lifecycle risk and reduces the cost of future remediation.

Carbofol^® + complies with GRI GM-13 at OIT ≥ 200 min (ASTM D8117) and HP-OIT ≥ 600 min (ASTM D5885). Density: ≥ 0.940 g/cm³ (EN ISO 1183). NCTL stress crack resistance: ≥ 500 h (ASTM D5397). Asperity height: ≥ 0.9 mm for BF/TF grades (ASTM D7466). MFR: 1.0 to 3.0 g/10 min (EN ISO 1133, 190 °C / 5.0 kg) for consistent weld quality at typical temperatures of ~380 °C.

Forms an impermeable polymeric barrier (GBR-P) preventing migration of leachate, process liquids, and contaminants through the liner.

Typical applications:

Tailings storage facility (TSF) base liner and side slope liner
Heap leach pad primary and secondary liner
Mine water containment pond and evaporation basin
Mine closure and recultivation capping system

Carbofol^® + is the preferred HDPE geomembrane for tailings storage facility liners and heap leach pad applications. It forms an impermeable base liner beneath mine residues, preventing leachate from entering the groundwater. The extended OIT (≥ 200 min) and HP-OIT (≥ 600 min) protect the liner under prolonged exposure to acid mine drainage, cyanide solutions, and other aggressive mining process liquids. For slope applications, the BF/TF embossed surface structure enables stable liner installation on inclinations from 20 to 45 degrees, including near-vertical rocky sections requiring bolt anchoring.

Typical applications:

Landfill base liner (Class I, II, III per national regulations)
Cap and closure liner system over closed landfill cells
Intermediate liner between waste deposition phases
Landfill cap in piggyback expansion where aggressive gas is present

Carbofol^® + provides enhanced protection in landfill applications where standard GM13 performance may be insufficient. Industrial and hazardous waste facilities produce leachate with high chemical aggression. Carbofol^® + extends liner lifespan by doubling the standard OIT value. The BF/TF variant ensures stable slope sealing in cap systems and on engineered side slopes. It is the choice when aggressive chemistry demands more than the GM13 baseline.

Typical applications:

Tailings storage facility (TSF) base liner and side slope liner
Heap leach pad primary and secondary liner
Mine water containment pond and evaporation basin
Mine closure and recultivation capping system

Typical applications:

Landfill base liner (Class I, II, III per national regulations)
Cap and closure liner system over closed landfill cells
Intermediate liner between waste deposition phases

Property	Unit	Carbofol^® +
Oxidative resistance – the defining property of the "+" types
Oxidation induction time (OIT)	min	200
High-pressure oxidation induction time (HPOIT)	min	600
Residual OIT and HPOIT after oven ageing	—	Significant percentage retained
Reference requirement GRI-GM13 (for comparison)
Oxidation induction time (OIT)	min	≥ 100
Property	Unit	Carbofol^® +
High-pressure oxidation induction time (HPOIT)	min	≥ 400
Product configuration
Documented types	—	Carbofol^® + 406 2.0 7.5 s/s GM13 MT and Carbofol^® + 406 2.0 7.5 BF/TF GM13 MT
Manufacturing width	m	up to 7.50
Surface	—	Smooth, and BF/TF embossed for slopes and shear-stress transmitting applications

Conformity with EN 13493 (polymeric geosynthetic barriers). Third-party verified by notified body.

Standard specification for HDPE smooth and textured geomembranes. OIT and HP-OIT values exceed GM13 baseline requirements by 2×.

Approved for landfill base and cap liner systems by BAM (Federal Institute for Materials Research and Testing), Germany.

Quality and environmental management system certified at Naue manufacturing facility.

One platform – multiple solutions: access a wide range of geotechnical design tools in a single portal.
User-friendly and accessible: available anytime, anywhere via desktop or mobile.
Optimised cost and material usage: reduce construction costs while ensuring long-term project stability.
Compliant with industry standards: aligns with AASHTO, and other engineering guidelines.

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Carbofol^® + addresses the central long-term failure mechanism in HDPE geomembranes: polymer oxidation. It depletes the antioxidant stabilisers in the PE matrix; once depleted, the polymer embrittles and loses stress crack resistance - accelerated by aggressive chemicals, acidic mine drainage and UV radiation.

Standard GRI GM-13 requires OIT ≥ 100 min (ASTM D8117) and HP-OIT ≥ 400 min (ASTM D5885) - baseline values calibrated for general applications. GRI Whitepaper No. 6 documents that antioxidant depletion accelerates significantly under acidic and basic conditions, exactly what heap leach operations and tailings ponds create. Carbofol^® + doubles both parameters - OIT ≥ 200 min, HP-OIT ≥ 600 min - and maintains the required residual values after oven ageing (ASTM D5721), giving designers a quantified safety reserve to document in their specification.

The combined OIT and HP-OIT stabiliser packets matter most where future chemistry is uncertain: mining projects change process chemistry over time, and the liner defends against both acidic leaching agents (e.g. sulfuric acid in copper production) and basic process liquids (e.g. sodium cyanide in gold processing). All standard GM13 mechanical properties are retained - ductility and weldability are not compromised.

Carbofol^® + is an enhanced HDPE geomembrane with OIT ≥ 200 min (ASTM D8117) and HP-OIT ≥ 600 min (ASTM D5885). Standard Carbofol^® meets the GM13 baseline of OIT ≥ 100 min and HP-OIT ≥ 400 min. The ‘+’ designation indicates doubled oxidation resistance. Density of both grades: ≥ 0.940 g/cm³. Carbofol^® + is the choice for mining, aggressive leachate environments, and high UV applications.

Pricing depends on project volume, variant, roll format, and delivery location. Contact Naue directly via request form below for a project-specific quotation.

Use smooth s/s on horizontal base liners where slope friction is not the design driver. Use BF/TF on slopes steeper than approximately 1:9 (6 degrees). BF/TF asperity height ≥ 0.9 mm (ASTM D7466) increases interface friction. BF/TF also allows heated wedge welding without grinding.

HP-OIT (ASTM D5885) measures oxidation resistance under elevated pressure, simulating long-term conditions in lined systems. Carbofol^® + HP-OIT ≥ 600 min provides a 50 % safety reserve over the GM13 baseline of 400 min. This is critical for TSF and heap leach liner longevity.

Carbofol^® + carries CE marking (AVCP System 2+, EN 13493), GRI GM-13 compliance with enhanced OIT and HP-OIT values, BAM approval for German landfill applications (since 1989), and ISO 9001 / ISO 14001 manufacturing certification. Declared service life: 25 years for exposed applications (DoP Annex B).

The BF/TF variant was verified in the TSF South-East Europe project on slopes 20 to 45 degrees. Asperity height ≥ 0.9 mm (ASTM D7466) and puncture resistance ≥ 535 N (EN ISO 12236) ensure durability. Rock bolt anchoring (394 bolts in TSF reference project) enables use on near-vertical rocky faces.

Carbofol^® + is available in 2.0 mm thickness. Standard roll size: 120 m × 7.5 m. Roll weight: approx. 1,680 kg (s/s) and approx. 1,788 kg (BF/TF). The 7.5 m width reduces the number of field welds per unit area compared to 5.0 m standard rolls.

Carbofol^® + complies with EN 13493, DIN EN 1849-2 (thickness), GRI GM-13, ASTM D8117 (OIT), ASTM D5885 (HP-OIT), ASTM D5397 (NCTL), ASTM D7466 (asperity height), EN ISO 10319 / ASTM D6693 (tensile), EN ISO 12236 (puncture), EN ISO 1183 (density), and EN ISO 1133 (MFR). BAM approval applies to German landfill applications under DepV regulations.

Yes. Naue provides project-specific technical support through the Naue Portal and direct engineering assistance. Services include slope stability analysis, liner system design, shear strength testing, and specification writing. Discover the software in the Naue Portal or contact us for any assistance via contact form below.

Carbofol^® + HDPE geomembrane

Carbofol^® + HDPE geomembrane function:

Barrier

Carbofol^® + HDPE geomembrane advantages: oxidation resistance and slope stability

Extended oxidation resistance

Straightforward installation

Superior weldability

No delamination risk

Certified 40+ years

Application areas

Tailings storage facilities and heap leach pad liners

Landfill base liners and cap systems

Technical properties

HDPE geomembrane oxidation resistance: OIT and HP-OIT matter

Certificates

CE marking (AVCP System 2+)

GRI GM-13

BAM certification

ISO 9001 / ISO 14001

Naue Portal: your all-in-one free geotechnical software solution for planning and cost estimation

Frequently asked questions

Bentofix^®

Bentofix^® + X

Bentofix^® Green

Bentofix^® X

Carbofol^®

Let’s discuss your project!

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Carbofol® + HDPE geomembrane

Carbofol® + HDPE geomembrane function:

Barrier

Carbofol® + HDPE geomembrane advantages: oxidation resistance and slope stability

Extended oxidation resistance

Straightforward installation

Superior weldability

No delamination risk

Certified 40+ years

Application areas

Tailings storage facilities and heap leach pad liners

Landfill base liners and cap systems

Tailings storage facilities and heap leach pad liners

Landfill base liners and cap systems

Technical properties

HDPE geomembrane oxidation resistance: OIT and HP-OIT matter

Certificates

CE marking (AVCP System 2+)

GRI GM-13

BAM certification

ISO 9001 / ISO 14001

Naue Portal: your all-in-one free geotechnical software solution for planning and cost estimation

Frequently asked questions

Related Naue geosynthetic barrier products

Bentofix®

Bentofix® + X

Bentofix® Green

Bentofix® X

Carbofol®

Let’s discuss your project!

Where to meet Naue next

Soluciones geosintéticas para infraestructura hidráulica resiliente

Soluções geossintéticas para infraestrutura hidráulica

Cobramseg 2026

GeoQuebec 2026

MiningMetals Central Asia 2026

Planifique más rápido, decida mejor – conozca el “Naue Portal” en vivo

Solutions brochures

Technical notes

What is Carbofol® + and how does it differ from standard Carbofol®?

What does Carbofol® + 406 2.0 BF/TF GM13 cost?

When should I use Carbofol® + 2.0 s/s instead of 2.0 BF/TF?

Why does HP-OIT matter more than standard OIT for mining geomembranes?

What certifications does Carbofol® + hold?

How robust is Carbofol® + during installation on steep slopes?

What roll sizes does Carbofol® + come in?

Which standards is Carbofol® + designed to comply with?

Does Naue offer technical support for Carbofol® + liner design?

Carbofol^® + HDPE geomembrane

Carbofol^® + HDPE geomembrane function:

Carbofol^® + HDPE geomembrane advantages: oxidation resistance and slope stability

Bentofix^®

Bentofix^® + X

Bentofix^® Green

Bentofix^® X

Carbofol^®