Imerys’ innovative new Sewper® Liner is designed to protect new-build wastewater infrastructure, providing the highest level of durability against hydrogen sulphide (H2S) biogenic corrosion as a mineral-bound coating for new concrete.
Sewper® Liner follows where SewperCoat® rehabilitation mortar has been proving itself for over 30 years. In projects from Paris to Washington, from Inverness to Sydney, SewperCoat® actively suppresses the bacteria that cause corrosion of concrete in sewers where hydrogen sulphide is present.
Both products can be spray applied and are rapid hardening. SewperCoat® allows assets to be returned to use in as little as 6 hours or less, ensuring projects can be completed quickly.
Three modes of action ensure assets such as pipes, chambers and other structures where hydrogen sulphide is present are protected. Firstly, the surface is alumina rich, forming an acid-resistant barrier in acidic environments.
Secondly, when bacterial activity causes the pH to fall, aluminium ions are liberated on the surface leading to a bacteria-static effect which reduces bacterial activity, in turn reducing the production of sulphuric acid and restricting corrosion. Finally, the neutralisation of Sewper® products is 40% higher than standard concretes, meaning higher durability, even in the same conditions.
Sewper® products are quicker to use and last longer than alternative technologies, so that overall project costs are reduced. Given their proven longlife, Sewper® Liner and SewperCoat® are better long-term sustainable solutions for wastewater systems.
