120 Mil(3 mm) HDPE Geomembrane

Material：High-Density Polyethylene (HDPE) virgin resin, typically with a purity exceeding 97.5%
Nominal Thickness：120 mil / 3.0 mm
Shipping Method：logistics
Product Category： HDPE Geomembrane, Geomembrane
Appearance： Black (due to carbon black content).
Price：The price of 120 Mil(3 mm) HDPE Geomembrane is not fixed and is influenced by various factors. For more details, please consult us.

The 120 mil (3.0 mm) HDPE geomembrane is a flexible impermeable barrier known for its extremely low permeability, excellent chemical resistance, and outstanding physical mechanical properties. Its 3 mm thickness provides exceptional puncture and tensile resistance, making it the ideal choice for the most demanding containment applications, including projects with severe environmental conditions, high safety requirements, and long design service life (decades).

Performance

120 mil(3 mm) HDPE geomembrane has the following characteristics：

Excellent Impermeability: With a hydraulic conductivity (K) of less than 1×10⁻¹³ cm/s, it is an virtually impervious barrier to both liquids and vapors.
Outstanding Chemical Resistance: This HDPE plastic liner is highly resistant to a wide range of chemicals, including acids, alkalis, oils, and industrial waste leachates.
Superior Physical Mechanical Properties:
- High Strength: Exhibits high tensile strength (typically ≥ 33 kN/m) and elongation at break (≥ 700%), allowing it to withstand base settlement and subsidence.
- High Puncture Resistance: The 120 mil(3 mm) HDPE geomembrane thickness offers outstanding resistance to puncture from sharp subgrade materials.
Excellent UV Resistance: The 2-3% carbon black content provides superior resistance to ultraviolet radiation, ensuring long-term performance in exposed applications.
Outstanding Stress Crack Resistance: High-quality HDPE liners offer excellent resistance to Environmental Stress Cracking (ESCR), ensuring integrity under long-term load.
Proven Weldability: Seams can be reliably fused using dual-track hot wedge or extrusion welders, creating a continuous, strong, and monolithic barrier.

Application

This 120 mil(3 mm) HDPE geomembrane liner is typically specified as a primary liner in single or double composite liner systems for high-risk projects.

Solid Waste Containment:
- Base liners and final cover systems for municipal solid waste (MSW) landfills.
- Primary and secondary liners for hazardous waste landfills.
Water & Hydraulic Works:
- Lining for reservoirs and dams.
- Canal lining for water conveyance.
Mining Industry:
- Heap leach pads and tailings impoundment liners (to prevent groundwater contamination from heavy metals and acidic drainage).
Industrial & Environmental Projects:
- Lining for wastewater treatment ponds and anaerobic lagoons.
- Containment for industrial waste storage and evaporation ponds.
Other Specialized Applications:
- Liner for decorative lakes and constructed wetlands.
- The 120 mil (3mm) high-density polyethylene geomembrane is used as a waterproof layer for tunnel engineering.

Specifications

The following table outlines typical properties for a 3mm HDPE geomembrane meeting the GRI GM13 standard (per ASTM test methods).

Property	Test Method	Typical Value (3.0mm)
Nominal Thickness	ASTM D5199	3.0 mm (120 mil)
Density	ASTM D1505	≥ 0.940 g/cm³
Tensile Properties (Yield)	ASTM D6693	≥ 22 kN/m
Tensile Properties (Break)	ASTM D6693	≥ 33 kN/m
Elongation at Break	ASTM D6693	≥ 700 %
Tear Resistance	ASTM D1004	≥ 187 N
CBR Puncture Resistance	ASTM D6241	≥ 7100 N
Pyramid Puncture Resistance	ASTM D4833	≥ 580 N
Stress Crack Resistance (NTSS)	ASTM D5397	≥ 500 hrs
Carbon Black Content	ASTM D1603	2.0 – 3.0 %
Carbon Black Dispersion	ASTM D5596	Category 1 or 2
Oven Aging at 85°C	ASTM D5721	≥ 90% Property Retention
Permeability Coefficient	ASTM E96	< 1.0 × 10⁻¹³ g·cm/(cm²·s·Pa)