Reservoir Solutions
Haogenplast ATIM ELVA / EvaFlex™: Premium Water Containment Solutions for South Africa
High-Performance Lining & Floating Cover Systems for Demanding Environments
Haogenplast ElvaFlex™ (ATIM ELVA) is a premium Ethylene Inter-polymer Alloy (EIA) geomembrane based on DuPont’s Elvaloy® KEE (Ketone Ethylene Ester) solid plasticizer technology. Designed and produced since the early 1980s, it serves as the ultimate solution for liners, floating covers, tank seals, and containment systems in applications demanding extreme chemical resistance and long-term environmental durability.
The Challenge: Why Conventional Materials Underperform
In the high-intensity solar environments of South Africa, standard containment materials often fail well before their intended design life due to extreme UV radiation and radical diurnal temperature cycles.
Conventional PVC: Relies on low-molecular-weight liquid plasticizers. Over time, these migrate out of the polymer, leaving the membrane brittle and prone to environmental stress cracking.
fPP-R (Flexible Polypropylene Reinforced): Field evidence from similar climates in Australia and Israel shows that fPP-R liners frequently lose their additive packages, leading to systemic cracking and failure within just 13 to 15 years.
Oxidation & Repair Issues: Many geomembranes oxidize over time, requiring complex surface grinding or chemical reactivation for any future repairs, which significantly increases long-term maintenance costs.
Built to Withstand Africa's Toughest Challenges
Here, at Haogenplast ZA we supply advanced reinforced PVC membranes designed specifically for large-scale water storage applications across South Africa. Engineered and certified through Haogenplast’s global manufacturing facilities, these membranes provide reliable performance in demanding climates and challenging site conditions.
Our solutions support a wide range of water-containment needs, from agricultural irrigation ponds to industrial reservoirs and municipal storage facilities.
Core Technology: The Elvaloy® Advantage
ATIM ELVA (marketed as ElvaFlex™) represents the pinnacle of polymer engineering. The material is a high-molecular-weight thermoplastic where the PVC resin is alloyed with Elvaloy® KEE. Because these polymers are completely miscible, they form a permanent, single-phase alloy that prevents the separation or migration of components.
Technical Advantages
Non-Migrating Plasticizers: By using solid-phase Elvaloy®, EvaFlex™ eliminates the “drying out” effect. The membrane retains its original flexibility and integrity even after decades of exposure to 40°C+ heat.
Zero Oxidation & Maintenance Economics: Unlike other membranes that oxidize and require grinding or chemical “reactivation” before repair, EIA does not oxidize. This eliminates the need for complex pre-weld preparation, significantly reducing on-site labor costs and downtime for repairs.
High Strength Reinforcement: Engineered with a polyester scrim or fleece reinforcement, the membrane achieves a massive tensile strength of up to 65 MPa (per ASTM D-882), providing the puncture resistance necessary for heavy industrial use and steep 2:1 side slopes.
- Logistical Efficiency: The inherent flexibility of EIA allows it to be pre-fabricated into large-scale panels and folded for transport. This is a critical advantage for remote South African mining and agricultural sites where on-site welding must be minimized.
Dimensional Stability: EvaFlex™ geomembranes feature an exceptionally low coefficient of thermal expansion
(1.4 \times 10^{-5} cm/cm/°C). This ensures high dimensional stability and perfect conformance to the substrate, preventing the “bridging” or “wrinkling” often seen in materials with high thermal expansion.
Conservation & Financial Benefits for Operators and Engineers
Water Security & Conservation: Floating covers drastically reduce evaporation—a significant loss of capital in water-scarce regions. This transforms water from a rising OPEX cost into a protected asset.
Algae & Photosynthesis Control: By effectively blocking UV radiation, the system prevents photosynthesis, eliminating algae growth and reducing the need for expensive chemical treatments and ongoing maintenance.
Contamination Prevention: Provides a physical barrier against bird nesting (critical near airports/infrastructure), wind-borne bio-hazards, external pollutants, and debris.
Potable Water Safety: Specifically formulated and tested for drinking water contact (meeting AS 4020 international standards), ensuring low-to-zero extraction of additives into the water supply.
Lifecycle Economics: Extended service life (>30 years warranted in suitable applications), low maintenance, easy repairs, and high residual value lower the total cost of ownership (TCO).
Operational Reliability: Handles dynamic loads (wind, level changes), ground movement, and aggressive chemistries. Compatible with leak detection systems and suitable for almost all climates.
Sustainability: Supports biogas harvesting (anaerobic covers), reduces chemical treatment needs, and minimizes water loss in arid regions.
Versatility Across Industries
EvaFlex™ is designed for the most demanding sectors of the South African economy:
Mining & Industrial: Optimized for secondary containment of hydrocarbons, including diesel fuel, naphtha, kerosene, and crude oil. While highly resistant to fuels and oils, please note that resistance to specific industrial solvents is “Poor to Fair”; consult our technical team for specific chemical compatibility.
Agriculture: High-performance lining for irrigation reservoirs, fish ponds, and maritime agriculture (algae farming), where resistance to high mineral and salt concentrations is required.
Wastewater: Engineered for evaporation ponds and anaerobic lagoon covers used in odor control and biogas harvesting.
Emergency Storage: Salt ponds, fire reserves, and municipal community water facilities.
From Ponds to Industrial Basins - Reliable Containment Built for Africa
Southern Africa’s climate demands materials that can withstand high UV exposure, temperature fluctuations, and long-term water pressure. Our reinforced membranes are built to deliver superior resistance to chemicals, oils, greases, fuels, acids, bases, algae, fungus, bacteria and insects. Suitable for almost all climates, ELVA performs with excellence under harsh weather conditions, and within a wide range of temperatures, from extreme cold to extreme heat.
UV stability and colour retention for long-term outdoor exposure
Exceptional tensile strength and puncture resistance
Chemical and microbial durability suitable for a variety of water sources
Long-term elasticity to accommodate ground movement and structural shifts
Reliable waterproofing for reservoirs of any scale
Underground Water Reservoirs – Advanced Containment Solutions
Underground water storage reservoirs provide a strategic and efficient solution for storing potable water, desalinated water, and process water. They save valuable surface land, virtually eliminate evaporation, protect water quality from external contamination and UV exposure, and offer superior thermal stability in extreme climates.
The main engineering challenge in underground applications is achieving reliable, long-term internal lining of large concrete structures – often with high vertical walls, numerous pipe penetrations, complex corners, and limited access. This is where Haogenplast’s ElvaFlex™ (ATIM ELVA) EIA excels. Its exceptional flexibility combined with permanent weldability (thanks to zero oxidation) allows for precise installation on vertical walls, ceilings, and intricate details while maintaining absolute water purity.
Here in South Africa, where projects demand robust performance against challenging soil conditions, high humidity, and aggressive water chemistries, ElvaFlex™ delivers proven, decades-long durability with minimal maintenance and easy repairs – the same trusted solution successfully implemented in major desalination plants and critical water infrastructure worldwide.
High Flexibility
In addition to its superior resistance to aggressive agents, ELVA is a flexible solution that combines high mechanical strength with long-term durability. Available in a range of thicknesses to meet both the mechanical and environmental requirements, ELVA can be applied with polyester scrim or fleece reinforcement.
Engineered for African Conditions
Ask us Anything!
What ATIM ELVA (EvaFlex™) liners are suitable for?
Our ATIM ELVA membranes are suitable for a wide range of containment systems:
* Drinking water reservoir
* Floating covers
* Salt evaporation ponds
* Agricultural reservoirs and irrigation ponds
* Industrial water storage and process-water systems
* Municipal and rural community water facilities
* Firefighting and emergency water reserves
* Aquaculture and fish-farming ponds
* Mining and environmental
* containment basins
What makes ATIM ELVA (EvaFlex™) liners ideal for hot and sunny climates?
ATIM ELVA performs with excellence under the harshest weather conditions, including extreme heat. Our liners have been proven to withstand high UV radiation without oxidizing or degrading, making them perfect for regions with intense sun exposure.
How long is the expected service life of the reservoir liners?
Our liners offer exceptional long-term durability, with a proven track record of over 30 years of service life in severe Middle Eastern and Australian climates. The unique EIA formulation with DuPont's ELVALOY™ prevents plasticizer migration, ensuring the membrane stays flexible and watertight for decades without becoming brittle.
Are these liners safe for storing drinking water?
Yes, our materials strictly adhere to international regulatory standards of quality and safety. They are certified for potable water applications, meeting rigorous standards such as AS 4020, and have been consistently chosen by national water companies for over 30 years.
How do floating covers help with water conservation?
Installing our floating covers over water reservoirs significantly reduces water evaporation, which is crucial for water management in hot climates. Additionally, they prevent external contamination, stop bird nesting, and drastically reduce algae growth.
Can the liners be repaired easily after years of use?
Absolutely. Unlike conventional materials that oxidize and lose their properties over time, EIA materials do not oxidize. This means they retain excellent weldability and can be easily repaired even after many years of service, requiring only simple cleaning before welding.
What types of chemicals and aggressive agents are the liners resistant to?
ATIM ELVA (EvaFlex™) liners offer broad chemical compatibility. They provide superior resistance to a wide range of aggressive substances, including oils, greases, fuels, acids, bases, and hydrocarbons.
Do the liners offer protection against biological hazards?
Yes, the material acts as an excellent barrier to bio-hazards. It is specifically formulated to be highly resistant to fungus, algae, bacteria, and insects.
How does the material’s flexibility benefit the installation in reservoirs?
The exceptional flexibility and conformability of Haogenplast ElvaFlex™ (EIA) geomembrane allow it to closely follow complex concrete profiles, corners, and pipe penetrations common in reservoir construction. This reduces the risk of bridging or stress points and ensures a tight, leak-free fit even on irregular surfaces. Additionally, its low coefficient of thermal expansion provides excellent dimensional stability across extreme temperature fluctuations typical in Southern Africa, minimizing wrinkling and maintaining long-term integrity.
Can these liners be used for industrial or wastewater applications?
Beyond potable water reservoirs, these high-performance liners are used worldwide for waste treatment processes, industrial evaporation ponds, secondary containment of fuels, desalination plants, and even anaerobic lagoon covers for odor control and gas harvesting.
Quality Assurance & Global Certifications
As the regional distributor of Haogenplast’s globally certified products, we bring:
International-quality membranes approved under ISO, REACH, and Gold Mark standards
Local availability and support across Southern Africa
Technical guidance for installers, engineers, and project planners
Proven long-term performance backed by decades of material-science expertise
Proven Performance: Case Studies
Mekorot National Water (Israel): Multiple drinking-water reservoirs since 1985 (e.g., Hafez Haim 30,000 m², Noga 25,000 m²). Official 2016 confirmation of >25-year performance with maintained flexibility and excellent bird/algae control.
Australia (Gippsland Water): Replaced failed fPP-R at Ridge (2017) and Drouin (2018) potable reservoirs with 30-year warranted EIA systems. Handled project delays without weldability loss.
Industrial Applications: Successfully used in ammonium nitrate containment (1985–2010+), maritime agriculture (algae farms), and wastewater projects in the UK and Israel.
Check Out Client Testimonials
Working with global leaders like Mekorot
(Israel’s National Water Company),
Haogenplast has proven that EvaFlex™ is more than just a liner – it is a cost-protection asset.
Ready to Secure Your Water Supply?
Our reservoir membranes are delivered with full technical specifications, installation guidance, and product documentation, ensuring smooth project delivery from design to completion. Whether it’s a small agricultural pond or a large municipal facility, Haogenplast ZA provides a trusted and durable solution for long-term water containment.
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Install while your business runs – and enjoy up to 30 years of no-stress protection.