When it comes to tailings dams, the stakes are high and safety is so important. These dams hold back massive volumes of mining waste, most of which often contain harmful chemicals, heavy metals, and slurry. And the consequences of a leak can be catastrophic.
Dam liners play a very large role in protecting the surrounding environment near tailings dams. The kind of liner you opt for needs to be sturdy and durable, not to mention able to last for years.
The solution? Rollgum EPDM liner. This liner has excellent qualities that make it the most popular one on the market.
Why You Should Use Liner in a Tailings Dam
So why is pond liner so important in a tailings dam? Here are some ideas:
Prevent Groundwater Contamination
Tailings often contain toxic compounds, like sulfate and processing chemicals for example. A high-quality liner works to create a barrier between these compounds and the groundwater, stopping contamination from happening. It also helps to protect the surrounding area in general.
Stay Compliant with Environmental Regulations
Governments and regulators are always cracking down on mines and the regulations in place. This means that it’s vital to remain aware of the expectations. Dam liners are now non-negotiable in most countries and this is in place for a reason. By opting for a high-quality one, you’re proving that you take your environmental responsibility seriously.
Boost Dam Stability
Liners help with the stability of dams, and this is really important when avoiding issues further down the line. Liner systems help to manage pore water pressure and control seepage from taking place. Furthermore, it helps to stabilise the dam walls, making it safer for workers and surrounding environment.
Support Long-Term Mine Closure Plans
Tailings dams are often left in place after mining operations end, so a strong liner is vital. A quality liner extends the life of the dam’s containment system and plays a key role in mine closure planning. This reduces the need for post-closure monitoring and maintenance costs.
Protect Company Reputation and Social License
Liner failures or unlined dams that leak toxic material can cause major damage to your reputation. What might this result in? A loss of social licence to operate. Investing in a high-performance liner shows that a mining company is serious about sustainability and environmental responsibility.
EPDM vs HDPE: A Comparaison
HDPE (High-Density Polyethylene) is a popular liner material known for its chemical resistance and strength. But it tends to be less flexible and more prone to cracking compared to EPDM.
Here is a comparison of key features between EPDM and HDPE:
| Feature | EPDM | HDPE |
| Flexibility | Excellent | Poor (prone to cracking) |
| UV Resistance | Outstanding | Requires covering |
| Chemical Resistance | High | High |
| Puncture Resistance | High | Moderate |
| Ease of Installation | Easy (fewer seams, flexible) | Rigid and difficult to weld |
| Expected Lifespan | 50+ years | 20–30 years (under ideal
conditions) |
Why EPDM Works So Well in Tailings Dam Applications
EPDM began in water tanks and green roofs but has quickly expanded into industrial and mining applications. And for very good reason. It’s a synthetic rubber membrane recognised for its toughness and flexibility, capable of withstanding some of the harshest conditions a liner may encounter.
What makes EPDM stand out is that it not only endures tough environments but also delivers consistent performance for decades with minimal maintenance.
Here’s why it’s a top choice for tailings containment:
Superior Flexibility
No matter if the conditions are freezing cold or scorching hot, EPDM stays flexible. Its ability to bend and move with the ground makes it perfect for dam walls or uneven subgrades that regularly shift or move.
UV and Ozone Resistance
Long-term sun exposure and ozone contact don’t cause EPDM to degrade. This makes it ideal for exposed dam installations, where traditional plastic liners often suffer from UV breakdown.
Excellent Chemical Resistance
EPDM stands strong against the harshness of tailings slurry. This includes acids, alkalis, and various process chemicals, and it manages to resist cracking or warping, keeping its stability intact.
Puncture and Tear Resistance
If you’re looking for a liner that doesn’t tear, EPDM is the one for you. It resists tearing and puncturing, even over rough or sharp surfaces. Keep in mind that on the rare occasion that a puncture does happen, repairs are simple and straightforward.
Longevity
EPDM liners remain securely in place once they’re installed. They’re built to last 30 to 50+ years, making them a major advantage for long-life tailings facilities or those planned for passive closure.
EPDM in Extreme Weather and Remote Mining Locations
While many EPDM liners exist, Rollgum EPDM has become the preferred choice for mining operators who want long-term confidence with minimal maintenance.
Why Choose Rollgum?
- 400% stretch and incredible conformability
- Available in multiple thicknesses (0.8mm to 1.14mm)
- Certified safe and chemically inert
- Designed for -40°C to +150°C temperature range
- 10–20 year manufacturer guarantee
- DIY-friendly for installations in remote areas
- Proven durability in mining, agriculture, and industrial applications
When to Use EPDM in Tailings Storage Projects
You should seriously consider EPDM if your project involves:
- Long-term containment with minimal maintenance
- Harsh weather conditions or exposed installations
- Extreme cold/hot climates and/or fluctuating temperatures
- Uneven terrain or irregular dam geometry
- A desire for faster, easier installation without expert crews
Final Thoughts: Invest in Confidence with EPDM
When it comes to tailings dam liners, compromise isn’t an option. Although HDPE has its uses, plastics can’t match the flexibility, longevity, and resilience that EPDM provides, especially in tough environments.
If you’re designing a tailings facility that needs to perform for 30, 40, or even 50 years, Rollgum EPDM gives you the confidence that your liner won’t be the weak point.
Need support for your next project? We’ve got experience in helping clients specify, size, and install the right liner system for their tailings dams. If you’re ready to take the next step, our team can walk you through the best options for your site.
Contact us today or explore our full range of Rollgum EPDM liner here.