Concrete water tanks are waterproofed from the inside using KÖSTER NB 1 Grey or KÖSTER NB 2 White. KÖSTER NB 1 Grey is certified for use in drinking water environments.
The waterproofing is applied onto solid and prepared concrete substrates. The primer KÖSTER Polysil TG 500 increases the mechanical resistance of concrete surfaces and immobilizes salts present in the substrate. Smaller areas are repaired with KÖSTER Betomor Multi A. Larger areas can be restored and reprofiled with KÖSTER Repair Mortar R4 or the fast setting mortar KÖSTER Repair Mortar NC.
In the case of below grade tanks, the external side is waterproofed with a crack bridging waterproofing, for example KÖSTER Deuxan 2C.
For waterproofing as well as for concrete repair, KÖSTER Polysil TG 500 is used as a primer in order to harden the concrete and prepare the substrate for the repair mortar.
Always adhere to the specifications in the respective Technical Guidelines.