Single-component sealing systems use Carbofol® HDPE geomembranes as the sealing layer to protect groundwater and soil at facilities for storing, filling and transferring (LAU) and for manufacturing, treating and using (HBV) water-hazardous substances. Combined with Secutex® protective nonwovens above and below the geomembrane, they form durable, chemically resistant single-layer sealing systems for collection sumps and bunded areas. Typical facilities include chemical warehouses, filling stations, collection sumps, liquid and container depots, chemical plants and scrapyards.
Sealed floors where hazardous chemicals are stored
Groundwater protection under forecourts and dispensing areas
Sumps and bunded areas that capture spills and leaks
Industrial areas and sealed storage for liquids and containers
A single-component system seals with one Carbofol® HDPE geomembrane, optionally protected above and below by Secutex nonwovens. Where monitoring is required, a leak-detection system can be installed below the membrane. Proper execution is certified by an expert in accordance with the AwSV.
Single-component sealing systems for LAU/HBV facilities are designed and installed in accordance with German water-protection law and the relevant approvals. Naue provides engineering support and installation as a certified WHG specialist company.
Practical benefits:
Single-layer Carbofol® HDPE (PE-HD) geomembranes protect groundwater and soil at collection sumps and bunded areas. Carbofol® geomembranes at least 1.5 mm thick meet the wide range of required chemical resistance in the DIBt media list, along with all physical requirements. Besides the product-specific DIBt approval, Carbofol® also holds a water-law construction-type approval. Even for collection sumps handling media group 6 substances (e.g. trichloroethylene), a 3.0 mm DIBt-approved Carbofol® seals the structure reliably. It welds excellently, so overlaps and complex connections can be made gas- and water-tight.
High-quality single-layer systems require appropriately dimensioned, mechanically bonded Secutex® protective nonwovens above and below the Carbofol® geomembrane, depending on the project. For a low-gravel sand base (gravel content below 30%) or corresponding fill material, a 400 g/m² mechanically bonded PP Secutex® nonwoven is sufficient; for coarser-grained soils, mechanically bonded Secutex® nonwovens with a mass per unit area of up to 1,200 g/m² are used. The nonwovens protect the Carbofol® geomembrane against mechanical damage during installation and operation.
Below the Carbofol® geomembrane, either a drainage-and-inspection-pipe system or an electro-resistive leak-location system can be installed for permanent monitoring and documentation of the seal's functionality. After completion, proper execution of the single-layer sealing system must be certified by an expert in accordance with the AwSV (which replaced the former VAwS).
Selection depends on the media handled, the subgrade and the monitoring requirement. This matrix outlines the typical choices.
Key principle: a single DIBt-approved Carbofol® layer seals the structure; Secutex® nonwovens protect it, and an optional leak-detection system enables permanent monitoring.
| Scenario | Recommended |
|---|---|
| Standard chemical resistance | Carbofol® HDPE from 1.5 mm, DIBt-approved to the media list |
| Most aggressive media (e.g. media group 6) | Carbofol® HDPE 3.0 mm, DIBt-approved |
| Low-gravel sand base (gravel < 30%) | Secutex® PP nonwoven 400 g/m², above and below |
| Coarser-grained subgrade | Secutex® PP nonwoven up to 1,200 g/m², above and below |
| Permanent monitoring required | Drainage-and-inspection-pipe system or electro-resistive leak-location below the membrane |
Proven chemical resistance
Carbofol® meets the DIBt media list; a 3.0 mm membrane seals even media group 6 substances.
Approved system
Product-specific DIBt approval plus a water-law construction-type approval; expert acceptance per AwSV.
Simple, single-layer installation
One sealing layer reduces installation phases and sealing complexity.
Gas- and water-tight detailing
Excellent weldability for reliable overlaps and complex connections.
They protect groundwater and soil at LAU (storing, filling, transferring) and HBV (manufacturing, treating, using) facilities that handle water-hazardous substances. Industrial groundwater protection application areas are for example chemical warehouses, filling stations, collection sumps, liquid and container depots, chemical plants and scrapyards.
A single Carbofol® HDPE geomembrane as the sealing layer, plus mechanically bonded Secutex® PP protective nonwovens above and below. No geosynthetic clay liner is used in this Naue single-component solution.
Carbofol® geomembranes of at least 1.5 mm meet the wide range of chemical resistance in the DIBt media list, along with all physical requirements. A 3.0 mm DIBt-approved membrane seals reliably even against media group 6 substances.
For a low-gravel sand base (gravel content below 30%), a 400 g/m² mechanically bonded PP Secutex® nonwoven is sufficient. For coarser-grained soils, Secutex® nonwovens of up to 1,200 g/m² are used and placed above and below the geomembrane.
Yes. Below the geomembrane, a drainage-and-inspection-pipe system or an electro-resistive leak-location system can be installed for permanent monitoring and documentation of the seal's functionality.
Carbofol® holds a product-specific DIBt approval and a water-law construction-type approval (Bauartzulassung). In Germany the WHG (Water Resources Act) and the AwSV govern LAU/HBV facilities; after installation, an expert (Sachverständiger) must certify proper execution in accordance with the AwSV.
Where the regulatory framework and the media permit, a single DIBt-approved Carbofol® layer with Secutex® protection provides reliable, cost-effective groundwater protection with fewer installation phases. Where higher monitoring requirements apply, a double-liner system with a monitored control zone is used instead. Please contact us for support in your system selection process.
Carbofol® geomembranes are heat-welded; overlaps and complex connections are made gas- and water-tight and verified by non-destructive weld testing as part of quality assurance.
Yes. Naue is a certified WHG specialist company and provides engineering support, seam welding and quality assurance, and on-site installation.
Naue Secutex® is a mechanically bonded nonwoven geotextile for separation, filtration and protection in roads, railways and hydraulic engineering projects.
