Geomembrane Liners

4MM HDPE Welding Rod (500m / 10KG Reel)

4 mm black HDPE extrusion welding rod on 10 kg reels, the filler for permanent, homogeneous seams in HDPE geomembranes and CPL concrete protection liners. Matched to GRI-GM13 sheet resin and stocked for fast delivery to tailings, heap leach, landfill and reservoir projects across Africa.

Manufactured to stringent ISO guidelines (GSE/Solmax)

High resistance to UV and chemical degradation

Excellent stress crack resistance and durability

Available in smooth, single-sided, and double-sided textured finishes

Overview

Our 4 mm HDPE extrusion welding rod is the filler material for welding HDPE geomembranes and CPL concrete protection liners. It feeds handheld extrusion welders for detail work that wedge welders cannot reach, such as patches, pipe boots, T-joints, corners and repairs. Made from HDPE resin matched to GRI-GM13 geomembranes, with carbon black for UV resistance, it fuses into the liner to form a single, homogeneous seam.

Across Africa it goes by several names: HDPE welding rod or extrusion rod in English-speaking countries, baguette de soudure PEHD in Francophone Africa, vareta de solda PEAD in Angola and Mozambique, and قضيب لحام HDPE in North Africa.

It is used on tailings storage facilities, heap leach pads, landfills, reservoirs, canals, wastewater ponds and CPL-lined sewers and tanks. Seams made with the rod can be tested to ASTM D6392 and GRI-GM19, as most mining and municipal specifications require.

Reels are supplied clean and sealed. Store them dry and out of direct sun, and keep the rod free of dust, which weakens welds. We deliver from stock across Africa, and our certified crews can also carry out the welding and seam testing, with full QA/QC records for every seam.

MaterialHDPE (High-Density Polyethylene)
StructureSolid extruded round rod
ColourBlack (standard); colour-matched to liner on request
StandardFormulated for compatibility with HDPE geomembrane liner welding
Roll Width4mm diameter (3mm and 5mm also available)
Roll Length500m per 10kg reel

Typical Properties

Testing Properties	Test Method	Unit	1.0mm	1.5mm	2.0mm	2.5mm
Thickness	ASTM D5199	mm	1.00	1.50	2.00	2.50
Density	ASTM D792	g/cm³	≥ 0.940	≥ 0.940	≥ 0.940	≥ 0.940
Tensile strength at break	ASTM D6693	kN/m	27	40	53	67
Tensile Strength at Yield	ASTM D6693	kN/m	15	22	29	37
Tear resistance	ASTM D1004	N	106	168	224	280
Puncture resistance	ASTM D4833	N	320	480	640	800
Stress crack resistance	ASTM D5397	hr	≥ 500	≥ 500	≥ 500	≥ 500
Roll width	-	m	7	7	7	7
Roll Length	-	m	210	150	110	85
Area per roll	-	m²	1470	1050	770	595

Note: The above specifications represent the product family properties. Please refer to the product datasheet for individual SKU values.

Typical Applications

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Tailings Storage Facility Lining

HDPE lining for tailings cells and embankments, including composite and double liner systems with leak detection.

Heap Leach Pad Lining

HDPE barriers beneath ore stacks and solution ponds for leach solution containment and recovery.

Reservoir & Dam Lining

HDPE lining to control seepage in dams, reservoirs and process water storage, selected for site conditions.

Landfill, Ash & Bund Lining

HDPE barriers for landfill cells, ash facilities and secondary containment, with protection and drainage layers as required.

Compatible Systems

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HDPE Smooth Geomembranes

The standard profile for flat and gently graded containment surfaces - TSF base liners, landfill cells, reservoirs, canals and process ponds on slopes not exceeding 3H:1V. Virgin resin, GRI-GM13 certified. 1.0 mm – 3.0 mm.

HDPE Textured Geomembranes (Single & Double)

Specified where slope stability and interface friction are design-critical. Single-textured for one-sided friction interfaces; double-textured mandatory on slopes steeper than 3H:1V. GRI-GM13 certified. 1.0 mm – 2.5 mm.

HDPE White / Reflective Geomembranes

Reflective white surface bonded to a black HDPE base - reduces liner temperature in high UV environments where exposed black HDPE can exceed 70 °C. Specified for heap leach pads, exposed caps and long-term surface applications. GRI-GM13 certified. 1.0 mm – 2.5 mm.

HDPE Conductive Geomembranes (ELL-enabled)

Conductive layer enables Electrical Leak Location (ELL) testing through cover soils and under water - pinpointing defects without excavation. Specified for high-consequence TSF, hazardous waste and double-liner systems requiring post-installation leak detection. 1.5 mm – 2.5 mm.

HDPE High-Temperature Geomembranes

Engineered for process fluid temperatures exceeding standard HDPE thermal tolerance - hot leach solutions, thermal heap leach and elevated-temperature industrial ponds above 60 °C. Project-specified. Contact our technical team for application assessment

Installation Guidance

Standard Method Statement

Installation follows the approved project method statement, panel layout and QA/QC plan. The receiving surface is inspected before deployment. Panel overlaps, anchorage, temporary restraint and welding conditions are set for the selected liner and equipment, following manufacturer guidance and the project specification.

Dual-track fusion welding and extrusion welding are used as appropriate to the seam and detail. Non-destructive testing uses the applicable method: pressurised air-channel evaluation to ASTM D5820 for dual seams, and vacuum-chamber evaluation to ASTM D5641 where suitable. Destructive peel and shear testing to ASTM D6392 is performed at the frequency and acceptance criteria defined in the approved project QA/QC plan.

Repairs are recorded and retested using the applicable method before acceptance and covering. Handover documentation is defined in the agreed scope and may include material roll records, panel layouts, weld logs, non-destructive and destructive test records, repair logs, as-built drawings and the handover certificate.

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: Roll numbers and manufacturer QC certificates checked against GRI-GM13 (HDPE) or GRI-GM17 (LLDPE); conformance samples taken where the CQA plan requires.
Trial Welds: Trial seams made and peel/shear tested at the start of each shift, for each welder and machine, and whenever conditions change.
Non-Destructive Seam Testing: 100% of seams tested: air-pressure testing of double-wedge welds (ASTM D5820) and vacuum-box testing of extrusion welds, patches and repairs (ASTM D5641).
Destructive Seam Testing: Seam samples cut at intervals set by the CQA plan (GRI-GM14) and tested in shear and peel to ASTM D6392 against GRI-GM19 values.
Leak Location Survey: Electrical leak location survey (ASTM D7007 for covered liners, ASTM D7002/D7703 for exposed liners) where specified, before handover.
Panel Layout & Repairs Record: As-built panel layout, seam log and repair log kept and signed off, with every repair vacuum-tested.

Manufacturing Standards

GRI-GM13 (HDPE) / GRI-GM17 (LLDPE) material specification
GRI-GM19 seam strength requirements
ASTM D6392 seam strength testing
ASTM D5820 air channel / ASTM D5641 vacuum box testing
ASTM D7007 electrical leak location (where specified)
Manufacturer QC certificates per roll
Formulated for compatibility with HDPE geomembrane liner welding

Documents

CATEGORY GUIDEPDF DOCUMENT

Product Selection Guide

Compare performance properties across the entire category hierarchy before specifying.

View guides

INSTALLATIONPDF DOCUMENT

Installation & Method Statement

Standard deployment procedures, installation specifications, and field application method statements.

QUALITY CHECKLISTREQUEST ON DEMAND

QA/QC Site Checklist

Field quality control procedures, inspection checklists, and testing standards to verify installation integrity.

TECHNICAL SPECREQUEST ON DEMAND

Technical Data Sheet (TDS)

Guaranteed minimum average roll values (MARV) and material testing properties.

ACCESSORIES GUIDEREQUEST ON DEMAND

Chemical Resistance / Accessories Guide

Chemical compatibility matrix and list of auxiliary materials needed for installation.

Projects Using 4MM HDPE Welding Rod (500m / 10KG Reel)

Case studies and reference projects for 4MM HDPE Welding Rod (500m / 10KG Reel) will be published shortly. Contact our technical team for reference projects across Africa.