Wastewater and sewer infrastructure is constantly exposed to harsh conditions that accelerate deterioration. Acids, sulphates, and chlorides attack conventional cement, leading to surface loss, cracking, and ultimately costly failures. Biogenic acid corrosion, in particular, is one of the most aggressive forms of attack. It occurs when bacteria in sewers produce sulphuric acid, which rapidly breaks down ordinary concrete. Chemical attack defence is therefore a critical consideration for asset owners and contractors working in this sector.
NATCEM® products are specifically engineered to resist these aggressive environments. Based on a natural cement binder, they provide chemical attack defence without additives or blending agents. The binder develops strength quickly, even in saturated conditions, and remains chemically stable under prolonged exposure to sulphuric acid and other contaminants. This makes NATCEM® highly effective in wastewater applications, where biogenic acid corrosion is a constant threat.
Typical uses include manhole chamber repairs, sewer lining, and reinstatement works within wastewater treatment facilities (such as the work detailed in our Margate Wastewater Treatment works case study – found here). In each of these applications, NATCEM® offers long-term durability, protecting infrastructure from chemical attack and significantly reducing future maintenance requirements.
Users also appreciate NATCEM® for its practicality. The material can be placed in flowing water and used down to zero degrees, allowing critical repairs to be completed quickly and without delay. Strong adhesion to existing substrates minimises the risk of delamination, ensuring the repair remains intact under heavy mechanical and chemical stress.
While NATCEM® is proven in wastewater environments, its performance also extends to other sectors where aggressive exposure is a challenge, such as rail tunnels and heritage structures. However, its unique resistance to biogenic acid corrosion makes it especially valuable in sewers and treatment plants.
Ultimately, chemical attack defence in wastewater infrastructure is not just about protecting concrete. It is about safeguarding public assets, reducing lifecycle costs, and maintaining reliable service. NATCEM® delivers all of this by combining rapid strength gain, robust chemical stability, and proven resistance to biogenic acid corrosion.
When working in wastewater, sewers, or any kind of environment where harmful chemicals can wreak havoc on your infrastructure – you need to know what’s going to prevent and protect.
Contact Natural Cement now – or learn more about how to expedite your wastewater work.
Date added: 29/09/2025