INFRALINER
Infralinerâ„¢ is a factory-fabricated HDPE concrete protection liner with integral V-Lock anchors. Mechanically locked into the concrete, not glued to it.
01 / WHAT IT ISProtection that becomes part of the structure
Infraliner is a high density polyethylene concrete protection liner manufactured with integral V-Lock anchor studs across its rear face. The liner is fixed to formwork before the pour. As the concrete is placed, thousands of anchors are encapsulated and mechanically locked into the structure.
The result is a protective barrier that is part of the concrete, not a layer sitting on top of it.
Sheets are prefabricated to suit the structure. All joints are extrusion welded on site to form a continuous barrier, and every weld is tested.
02 / WHY MECHANICAL ANCHORINGCoatings do not fail because the chemistry is wrong. They fail because the application has to be perfect everywhere.
Sprayed and painted coatings only perform if the application is right, and application depends on substrate preparation, temperature, humidity, film thickness and the person holding the gun. Get any one of those wrong on any part of the structure, and that is where the failure starts.
Mechanical anchoring removes the variable. The liner is held by the anchors. The anchors are held by the concrete.
Performance against failure mechanisms
- Biogenic H₂S corrosionSubstrate isolated
- Chemical attack≤0.06% change
- Live cracking in the substrate1,496% elongation
- Hydrostatic pressure behind the liner582.7 kN/m² pull-out
- Abrasion and impact≥945 N puncture
- Moisture ingress0.031% absorption
- Adhesion failureNot applicable
Chemical resistance to ASTM D 543, eight reagents. Full data in TDS-IL-HDPE-001.
03 / TECHNICAL SPECIFICATIONProperties and test methods
| Property | Test method | Value |
|---|---|---|
| Physical | ||
| Material | – | High density polyethylene |
| Sheet thickness | ASTM D5199 | 2.0 / 2.5 / 3.0 / 4.0 / 5.0 mm |
| Sheet width | – | Up to 3,200 mm |
| Knob height | – | 15 mm |
| Knob density | – | 430 knobs/m² |
| Density | ASTM D792 | 0.95 g/cc |
| Colour | – | Black, white, yellow, dual colour, custom on request |
| Mechanical | ||
| Tensile strength at yield | ASTM D6693 | ≥45 kN/m |
| Tensile strength at break | ASTM D6693 | ≥72 kN/m |
| Elongation at yield | ASTM D6693 | ≥14 % |
| Elongation at break | ASTM D6693 | ≥1,496 % |
| Tear resistance | ASTM D1004 | ≥440 N |
| Puncture resistance | ASTM D4833 | ≥945 N |
| Knob pull-out, to failure | – | 582.7 kN/m² |
| Durability & chemical resistance | ||
| Carbon black content | ASTM D1603 | 2.18 % |
| Standard OIT | ASTM D3895 | Did not oxidise |
| Water absorption | ASTM D570 | 0.031 % |
| Chemical resistance | ASTM D543 | 8 reagents tested, all ≤0.06 % change |
| Porosity, spark test | 7 kV | Pass |
| Design service life | – | 100+ years, non-UV |
Source: TDS-IL-HDPE-001 · Issue 1.0 · May 2026
04 / WHERE IT IS USEDBuilt for the environments that wear concrete out fastest
Sewer structures
Maintenance holes, trunk mains and sewer tunnels under sustained hydrogen sulphide attack.
Pump stations and wet wells
Turbulence, gas release and constant wetting and drying at the worst point in the network.
Treatment structures
Bioreactors, digesters and channels where chemistry and abrasion run together.
Precast products
Lined at the manufacturing plant, delivered to site ready to install.
Chemical bunds
Containment where a coating breach means a reportable release.
Mining and industrial
Process containment, tailings structures and heavy abrasion service.
05 / FOR SPECIFIERSLift this straight into your specification
Concrete protection lining shall be a factory-fabricated high density polyethylene sheet incorporating integral mechanical anchors on the rear face, cast into the concrete during placement. The liner shall not rely on adhesion to the substrate. All joints shall be extrusion welded and 100% tested in accordance with the manufacturer's inspection and test plan. Installation shall be carried out by an installer approved by the liner manufacturer.
06 / AVAILABILITYSupply only, or supply and install
Infraliner is supplied in standard sheet and roll formats, prefabricated to project requirements. PVC is available on request for applications where HDPE is not suitable.
Already specified a different liner? We install alternative AKS liner systems to the specified product and the specified detail.
Specifying a liner, or pricing one?
Send us the drawings and we will come back with a quantity and a price.