Imerys SewperCoat

The Imerys Calcium Aluminate range of products provides high performance concrete repair solutions for very aggressive wastewater environments.


Contech is the exclusive New Zealand distributor for Imerys products related to water and wastewater applications.

The combination of physical and chemical bond between the calcium aluminate cement and aggregate produces a superior concrete capable of withstanding the toughest combinations of thermal cycling, high heat, mechanical shock and biogenic corrosion.

With over 20 years track of international use, and applied in over 30 New Zealand wastewater structures Sewpercoat is proven protection against the effects of biogenic corrosion.

Available as Sewpercoat PG25 for low pressure wet application or HS40 for high pressure dry gunite application. For more information visit our Sewpercoat service page.