Geomembrane HDPE Geomembrane
Smooth HDPE geomembrane liner to GRI-GM13 — an impermeable high density polyethylene pond liner for landfill, water and containment, 0.75–3.0 mm.
- GRI-GM13
- 0.75–3.0 mm (30–120 mil)
- Smooth · Black
Textured Geomembrane
SIGMA textured geomembrane is a specially engineered HDPE textured geomembrane with a rough surface on one or both sides, produced to the GRI-GM13 standard. The textured surface raises the interface friction coefficient, so the liner stays stable on steep slopes and vertical works where a smooth sheet would slide. Made from imported polyethylene resin with carbon black and UV stabilizers, this textured HDPE geomembrane offers excellent chemical resistance, outstanding stress-crack capacity, lowest permeability and excellent UV resistance. Stocked single or double textured from 0.75 mm (30 mil) to 3.0 mm (120 mil) for landfills, mining, retaining backfills and waste containment.
GRI-GM13 (textured)0.75–3.0 mm (30–120 mil)Single/double textured · Black
Textured geomembrane built to GRI-GM13
SIGMA textured geomembrane is a specially engineered HDPE textured geomembrane with a rough surface on one or both sides, produced to the GRI-GM13 standard. Made from imported polyethylene raw material with advanced extrusion equipment, the black HDPE textured geomembrane meets or exceeds all aspects of GRI-GM13: excellent chemical resistance, outstanding stress-crack capacity, lowest permeability, excellent UV resistance and stable low-temperature embrittlement resistance.
Why a textured surface — friction on steep slopes
The defining benefit of a textured HDPE geomembrane is interface friction. The rough surface sharply raises the friction coefficient against soil and adjacent geosynthetics, so the liner stays put on steep slopes and vertical projects where a smooth sheet would slide. That is why double textured geomembrane is widely specified for high, steep slopes such as landfills, mining heap leach pads, retaining backfills and waste containment. Note that texturing lowers the break strength and break elongation versus a smooth sheet — the GRI-GM13 textured values below reflect this and must not be confused with smooth-sheet figures.
Single or double textured, and choosing a thickness
We supply both single-sided and double textured geomembrane from 0.75 mm (30 mil) to 3.0 mm (120 mil), with a minimum 0.40 mm (16 mil) asperity height per ASTM D7466. Single-textured suits a smooth-against-liner interface; double textured maximises friction on both faces. Where the project does not need slope friction, a smooth HDPE geomembrane is more economical; browse the full geomembrane range for both surfaces and other grades.
How the textured surface is made
SIGMA builds the HDPE textured geomembrane from imported virgin polyethylene resin with carbon black and UV stabilizers, using advanced extrusion equipment and professional production technology. The rough asperities are formed during manufacture to a minimum 0.40 mm (16 mil) height measured per ASTM D7466. Note that the texturing process slightly lowers break strength and break elongation versus a smooth sheet of the same thickness — this is normal and is exactly why the GRI-GM13 textured Table 2 values differ from the smooth grade and must not be substituted with smooth-sheet figures.
Installation and field welding
Textured rolls are deployed over a prepared subgrade and joined like smooth HDPE by hot-wedge (dual-track) welding, with extrusion welding around penetrations and details; seams are tested by air-pressure or vacuum box. At the seam overlap the asperities are typically ground smooth locally so the wedge gets a clean, consistent weld. The high interface friction that makes a double textured geomembrane stable on slopes is preserved across the field panels and locked at the perimeter in an anchor trench.
Quality, standards and service
Every roll of our single and textured HDPE geomembrane meets or exceeds all aspects of the GRI-GM13 (Rev. 16) standard, including the minimum asperity height, with the textured Table 2 tensile, tear, puncture, stress-crack and durability values verified by the designated ASTM methods. We confirm thickness, single- or double-sided texturing, roll width and length against your order and back each shipment with a manufacturer datasheet. Tell us the slope angle, interfaces and subgrade and we will recommend the right textured geomembrane grade.
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Key features
- GRI-GM13 textured high density polyethylene geomembrane
- Rough single or double surface — high interface friction for steep slopes
- Excellent chemical resistance and outstanding stress-crack capacity
- Lowest permeability and excellent UV resistance
- Stable low-temperature embrittlement resistance
- Cost-effective, fast deployment and easy transportation
Ideal for
- Steep-slope and vertical landfill liner and capping
- Mining — heap leach pads and process ponds
- Retaining and backfill structures requiring high friction
- Waste containment on inclined subgrades
- Reservoir and dam slopes where smooth liner would slide
Specifications
Textured HDPE Geomembrane — properties by nominal thickness, per GRI-GM13 (Rev. 16, March 17, 2021), Table 2 (min. ave., single/double textured).
| Property | Test Method | Unit | 0.75 mm (30 mil) | 1.0 mm (40 mil) | 1.5 mm (60 mil) | 2.0 mm (80 mil) | 2.5 mm (100 mil) | 3.0 mm (120 mil) |
|---|---|---|---|---|---|---|---|---|
| Thickness (min. avg.); 8 of 10 ≥ −10%, any −15% | ASTM D5994 | % of nominal | nom. −5% | nom. −5% | nom. −5% | nom. −5% | nom. −5% | nom. −5% |
| Asperity height (min.) | ASTM D7466 | mm (mil) | 0.40 (16) | 0.40 (16) | 0.40 (16) | 0.40 (16) | 0.40 (16) | 0.40 (16) |
| Density (min.) | ASTM D1505 / D792 | g/cm³ | 0.940 | 0.940 | 0.940 | 0.940 | 0.940 | 0.940 |
| Tensile — strength at yield | ASTM D6693 (Type IV) | kN/m (lb/in) | 11 (63) | 15 (84) | 22 (126) | 29 (168) | 37 (210) | 44 (252) |
| Tensile — strength at break | ASTM D6693 (Type IV) | kN/m (lb/in) | 8 (45) | 10 (60) | 16 (90) | 21 (120) | 26 (150) | 32 (180) |
| Tensile — elongation at yield | ASTM D6693 (Type IV) | % | 12 | 12 | 12 | 12 | 12 | 12 |
| Tensile — elongation at break | ASTM D6693 (Type IV) | % | 100 | 100 | 100 | 100 | 100 | 100 |
| Tear resistance (min.) | ASTM D1004 | N (lb) | 93 (21) | 125 (28) | 187 (42) | 249 (56) | 311 (70) | 374 (84) |
| Puncture resistance (min.) | ASTM D4833 | N (lb) | 200 (45) | 267 (60) | 400 (90) | 534 (120) | 667 (150) | 800 (180) |
| Stress crack resistance (min.) | ASTM D5397 (App.) | hr | 500 | 500 | 500 | 500 | 500 | 500 |
| Carbon black content (range) | ASTM D4218 | % | 2.0–3.0 | 2.0–3.0 | 2.0–3.0 | 2.0–3.0 | 2.0–3.0 | 2.0–3.0 |
- Asperity height is measured per ASTM D7466 on every 2nd roll (alternating measurement side for double-textured sheet); thickness is core thickness per ASTM D5994 (not D5199 as for smooth sheet).
- Textured values differ from smooth GRI-GM13: the texturing process lowers break strength and break elongation (100% vs 700% smooth), so these figures must not be substituted with smooth-sheet numbers. Yield strength, tear, puncture, density and durability match the smooth grade thickness-for-thickness.
- Carbon black dispersion (ASTM D5596): for 10 views, 9 in Category 1 or 2 and 1 in Category 3 (near-spherical agglomerates only).
- GRI-GM13 also defines a 1.25 mm (50 mil) textured grade (yield 18 kN/m / 105 lb/in; break 13 kN/m / 75 lb/in; tear 156 N / 35 lb; puncture 333 N / 75 lb), available on request.
- Durability (all thicknesses): Std-OIT 100 min min. (ASTM D8117) or HP-OIT 400 min (ASTM D5885); 85 °C oven aging Std-OIT retained 55% / HP-OIT 80% after 90 days; UV resistance HP-OIT retained 50% after 1600 hr (ASTM D7238 / D5885).
- Roll width and length are manufacturer/order-specific and are not governed by GRI-GM13 — contact us for stock sizes.
Frequently asked questions
What is a textured geomembrane and why use one?
A textured geomembrane is an HDPE liner with a deliberately rough surface on one or both sides. The texture raises the interface friction coefficient against soil and adjacent geosynthetics, so the liner stays stable on steep slopes and vertical works where a smooth sheet would slide. It is widely used for steep landfill slopes, mining heap leach pads, retaining backfills and waste containment.
Is the textured HDPE geomembrane made to GRI-GM13?
Yes. Our single and double textured HDPE geomembrane meets or exceeds all aspects of the GRI-GM13 (Rev. 16) standard, including the minimum 0.40 mm (16 mil) asperity height per ASTM D7466, with the textured Table 2 tensile, tear, puncture, stress-crack and durability values shown above.
What is the difference between single and double textured geomembrane?
Single-textured geomembrane is rough on one face and smooth on the other — used where only one interface needs high friction. Double textured geomembrane is rough on both faces to maximise friction against soil on both sides. We supply both; tell us which interfaces need friction and we will recommend single or double textured.
Why is the break strength lower than smooth HDPE liner?
The texturing process modifies the surface and slightly reduces break strength and break elongation compared with a smooth sheet of the same thickness — this is reflected in the GRI-GM13 textured Table 2 values. Yield strength, tear and puncture resistance remain at the smooth-grade level, and the friction gain is what makes textured liner the right choice for steep slopes.
How is textured geomembrane seamed?
Like smooth HDPE, textured rolls are joined by hot-wedge (dual-track) welding, with extrusion welding around details; seams are tested by air-pressure or vacuum. The textured surface is typically ground smooth locally at the seam overlap to ensure a clean weld.
How is textured geomembrane priced?
Price depends on thickness, whether the sheet is single- or double-sided textured, order quantity and current polyethylene resin cost; double textured generally costs a little more than single-textured of the same thickness. Send us the thickness, texturing and total area and we will quote a current factory price, with the best rate on container-load orders.
What is your minimum order quantity?
We supply both project quantities and smaller trial orders. Textured grades are produced to order, so the most cost-effective quantities are full-roll and container-load shipments. Tell us the area, thickness and single- or double-textured requirement and we will confirm the minimum order and roll sizes.
What is the lead time and how is it shipped?
Lead time depends on thickness, texturing, quantity and current production load; made-to-order textured rolls take longer than stocked smooth sheet. The textured HDPE geomembrane is supplied in rolls and shipped by sea in containers worldwide direct from our factory. Contact us with your destination port for a delivery schedule.
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