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Köpenick Townhall Berlin - Sealing on Top of Old Sealing

Köpenick Town Hall has a special location – it is exposed to highly fluctuating ground water levels on the banks of the River Spree. In 2013, an examination revealed a defective old sealant containing harmful substances.

External sealant on top of old sealant

against pressing groundwater

1 Soil excavated, dilapidated structural elements   removed
2 Sealing surfaces cleaned
3 Use of WEBAC® 5611 (without cement) as primer
4 Concave molding
5 WEBAC® 5611 (1 mm film thickness) applied
6 Protective layer

Köpenick Town Hall was built in 1905 in Mark Brandenburg brick Gothic style and was extended in the 1920s and 1930s.

During an examination of the external sealants in the town hall courtyard, damage to the tarcontaining/ bituminous old PAH sealant was noticed. Polycyclic aromatic hydrocarbons are carcinogenic and toxic and therefore harmful for humans and the environment. Installing a new external sealant resistant to pressing water would have meant completely removing the old sealant, which would have been very timeconsuming and costly.

The alternative? WEBAC® 5611. It is resistant to both PAH sealants and pressing water and was perfectly suited for the restoration project.