Biogas production is highly prioritized in Germany as a source of renewable energy. It has also been decided to phase out nuclear and coal powered plants, resulting in the accelerated construction of concrete silos.

To prevent rebar/concrete damage, the silos must be protected from the acidic biomass. The requirements are strict – sealing capability, durability and strength are given priority.

This has resulted in the certification of Controll Innerseal according to test procedures described in DIN 11622-2, carried out by TÜV Rheinland.

More than 500,000 m2 of concrete silos has been satisfactorily treated with Controll Innerseal and Controll Innerseal Plus.