The mineral waterproofing of balconies and terraces is carried out with crack bridging KÖSTER NB Elastic (white or grey), or KÖSTER 21. This waterproofing is resistant to foot traffic and can be covered with tiles. It also bonds to damp substrates.
Before installing the waterproofing the substrate is hardened and prepared with the primer KÖSTER Polysil TG 500. Fillets are installed with KÖSTER WP Mortar. In the wall floor junction and all areas in danger of cracking KÖSTER Flex Fabric is embedded into the fresh first waterproofing layer.
Concrete repair work is done with KÖSTER Betomor Multi A. The concrete surface must be mechanically cleaned and a solid substrate achieved. Reinforcement steel has to be thoroughly cleaned from rust by sandblasting. In case of severe damage the reinforcement has to be strengthened.
Minor damages in the concrete surface can be levelled with KÖSTER C-Coat, and painting done with KÖSTER Silicone Paint White.
Always adhere to the specifications in the respective Technical Guidelines.