For the protection of concrete surfaces against acids, the first step is to coat the surface with the negative side waterproofing KÖSTER NB 1 Grey. KÖSTER NB 1 Grey possesses excellent pressure and abrasion resistance, as well as chemical and sulphate resistance. This waterproofing layer protects the mineral substrate from degradation caused by harmful substances.
The acid protection itself is made with the three-component, highly chemical resistant, silicate and polymer-based special mineral mortar KÖSTER PSM. KÖSTER PSM is applied on horizontal and vertical areas which require very high acid resistance in the range of pH 0 – 8.
Surfaces made from KÖSTER PSM can be directly sealed with KÖSTER PSM 2S + after 4 hours without further mechanical surface treatment. KÖSTER PSM 2S + is a transparent, one-component, solvent-free sealant for mineral surfaces, which is characterized by a particularly high thermal and chemical resistance
Always adhere to the specifications in the respective Technical Guidelines.