Geomembrane Liners
EPDM Geomembrane Liner 1.14mm (45-mil)
Non-reinforced EPDM rubber geomembrane, 1.14mm. Full-width roll, 278.98m². For exposed dams, reservoirs, ponds and tank lining.
Overview
Non-reinforced EPDM (Ethylene Propylene Diene Monomer) rubber geomembrane in 1.14mm (45-mil) thickness, supplied in full-width rolls of 9.15m × 30.49m — 278.98m² per roll. Manufactured to ASTM D4637 Type I.
EPDM is a vulcanised thermoset rubber whose UV, ozone and weathering resistance is intrinsic to its molecular structure rather than dependent on additives that migrate over time. With 465% ultimate elongation (ASTM D412), it conforms to irregular substrates, accommodates differential settlement and flexes through daily thermal cycling that causes rigid coatings and lower-elongation thermoplastic liners to crack at joints and corrugations. This makes it the appropriate selection for permanently exposed service: uncovered reservoirs, open ponds, earthen dam embankments, concrete reservoir rehabilitation, and internal lining of corrugated steel and sectional water storage tanks.
Full-width rolls minimise field seams on large water-retaining structures, where seam frequency correlates directly with containment risk. Seams are completed using HP-250 primer with SecurTAPE and rolled to full contact — no thermal welding required, and no naked flame on site.
Not suitable for hydrocarbon, oil or solvent containment, or for lined landfill cells. For those applications, refer to our HDPE geomembrane range.
Supplied as a complete engineered system with bonding adhesive, primer, tape, flashing, sealant and termination hardware. Installed by certified crews across 30+ African countries.
- MaterialSKU 1 — Full Roll (EPDM-45-FR) Material / Polymer EPDM (Ethylene Propylene Diene Monomer) synthetic rubber
- StructureNon-reinforced, vulcanised thermoset sheet
- ColourBlack
- StandardASTM D4637 Type I
- Roll Width9.15 m
- Roll Length30.49 m (278.98 m² per roll)
Typical Properties
| Property | Test Method | 1.14mm (45-mil) | 1.52mm (60-mil) |
|---|---|---|---|
| Tensile Strength | ASTM D412 | 11.0 MPa | 11.0 MPa |
| Ultimate Elongation | ASTM D412 | 465% | 465% |
| Tear Strength | ASTM D624 Die C | 35.0 kN/m | 35.0 kN/m |
| Weight | - | 1.4 kg/m² | 1.9 kg/m² |
| Brittleness Temperature | ASTM D746 | -45°C | -45°C |
| UV Weathering | ASTM G155 | No cracks @ 41,580 kJ/m² | No cracks @ 41,580 kJ/m² |
| Roll Width (max) | - | 9.15m | 9.15m |
| Roll Length | - | 30.49m | 30.49m |
| Potable Water | - | NSF/ANSI 61 | NSF/ANSI 61 |
| Standard | - | ASTM D4637 Type I | ASTM D4637 Type I |
Note: The above specifications represent the product family properties. Please refer to the product datasheet for individual SKU values.
Typical Applications
View all applicationsMining Systems
EPDM is specified for process water storage ponds, mine water reservoirs and exposed containment structures where permanent UV resistance and NSF/ANSI 61 compliance are required - not for primary TSF or heap leach pad containment where HDPE chemical resistance is the governing specification.
Water Containment
The primary EPDM lining application. Specified for drinking water reservoirs, farm dams, irrigation storage ponds, community water storage and municipal infrastructure where potable water certification (NSF/ANSI 61), long-term UV exposure and flexible substrate conformance are design requirements.
Waste & Landfills
EPDM is suitable for leachate holding ponds and wastewater containment where UV exposure is the dominant design condition and fluid chemistry falls within EPDM's resistance envelope. Chemical compatibility must be confirmed against the specific leachate profile before specification - contact our technical team.
Compatible Systems
View all systemsEPDM Non-Reinforced 1.14mm (45-mil)
Primary stocked grade. Specified for dam lining, reservoir waterproofing, pond containment, and flexible internal lining of corrugated steel and sectional water storage tanks. Supplied in 9.15m × 30.49m and 6.10m × 30.49m rolls, or cut to size. Used with bonding adhesive and SecurTAPE seam system. ASTM D4637 Type I. NSF/ANSI 61.
EPDM Non-Reinforced 1.52mm (60-mil)
Heavy-grade option where additional puncture resistance or ballasted installation is required. Preferred for fully adhered systems on aggressive subgrades and long-term exposed containment with higher mechanical demand. Same chemical and UV performance as 45-mil. Contact us for availability and lead times.
EPDM Fire Retardant (FR) Grade
Specially formulated to inhibit flame spread — meets fire-retardant roofing membrane code requirements. Specified for commercial and industrial roofing where local fire codes mandate FR-rated membranes. Available in 1.14mm and 1.52mm. Contact us for project-specific availability.
Installation Guidance
Standard Method Statement
Subgrade preparation is critical for all EPDM lining systems. The substrate must be smooth, compacted to 95% Proctor, and free of protrusions, sharp edges, organic material and standing water before membrane deployment. On earthen embankments and dam slopes, a needle-punched geotextile protection layer is recommended between the subgrade and membrane where subgrade particle size, root penetration risk or construction traffic presents a puncture hazard.
For fully adhered systems, the substrate and underside of the membrane are coated with Carlisle bonding adhesive and allowed to reach tack before the membrane is rolled into place and broomed down. Seams between adjoining panels are completed using HP-250 primer applied to the splice area in conjunction with SecurTAPE or Factory-Applied Tape. All seams must be rolled with a silicone-bearing hand roller to ensure full contact and eliminate air entrapment. In temperatures below 5°C, the primed splice area must be heated with a hot-air gun before and during tape application.
For corrugated steel and sectional tank lining, the membrane is cut and fitted to the internal tank geometry with wall drapes installed first, followed by the base liner. The liner is terminated at the tank rim using termination bars and fasteners aligned to the bolt pattern of the corrugated rim, sealed with lap sealant and water cut-off mastic at all penetrations and fittings. All pipe penetrations are flashed using pressure-sensitive ELASTOFORM flashing or pressure-sensitive pipe seals. A full system review and material schedule should be completed by our technical team prior to order for tank lining projects.
Quality Assurance & Testing
Field QA/QC Checklist
- Subgrade Acceptance: Subgrade signed off before deployment: smooth, compacted, free of stones, roots and protrusions, and no standing water or desiccation cracks.
- Material Conformance: Sheet certificates checked against GRI-GM21 (EPDM) and the project specification.
- Seam Preparation: Seam areas cleaned and primed; seam tape or splice applied to the manufacturer's procedure and rolled down.
- Seam Inspection: 100% of seams probed and visually inspected; vacuum box testing where accessible (ASTM D4437).
- Penetrations & Details: Pipe boots, corners and anchor trench details completed with factory or field-fabricated details to the manufacturer's guide.
Manufacturing Standards
- GRI-GM21 EPDM geomembrane specification
- ASTM D4437 non-destructive seam testing
- Manufacturer installation guide
- Manufacturer QC certificates per roll
- ASTM D4637 Type I
Documents
Product Selection Guide
Compare performance properties across the entire category hierarchy before specifying.
Installation & Method Statement
Standard deployment procedures, installation specifications, and field application method statements.
QA/QC Site Checklist
Field quality control procedures, inspection checklists, and testing standards to verify installation integrity.
Technical Data Sheet (TDS)
Guaranteed minimum average roll values (MARV) and material testing properties.
Chemical Resistance / Accessories Guide
Chemical compatibility matrix and list of auxiliary materials needed for installation.
Projects Using EPDM Geomembrane Liner 1.14mm (45-mil)
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