Kharkov Zoo - newly constructed tanks for polar bears and penguines needed scratch resistant waterproofing
The newly build homes of polar bears an penguines in Kharkov zoo needed waterproofing. The requirement for the seal was high stability, excellent adhesion and scratch resistance or abrasion resistance.
Surface preparation is essential for coating success. All systems used at Kharkow Zoo are breathable and suitable for humid concrete. After cleaning and removal of loose parts, Concrete skin was removed with high pressure washer and Borox Zementhaut Entferner 1032. Due to Borox Zementhautentferner 1032 the time for this task was shortened drastically.
All joints were seperately treated with HydroFlex Tape 275 an elastic sealing membrane and fixed with Silipox 826 glue
As primer and bonding bridge Silox EPW 856 was applied directly on the wet surface. The water emulsifiable epoxy resin is water friendly and suitable for humidity. In this project we used SIlox EPW 856 as primer for the following coatings. Sprayed, rolled or painted SIlox EPW 856 is easy to apply and provides perfect conditions for following layers made of Silox EPW coating systems or Cembond 863.
Next step of surface preparation is the scratch mortar layer to close pinholes and blowholes to prepare the surface perfectly. This scratch mortar was made of the final coating Cembond 863 mixed with silica sand.
After that, the surface is ready to coat with the final layers of Cembond 863. This epoxy coating is suitable for humid and breathable surfaces. Kharkow zoo required special shades of grey to fit to the color of the later inhabitants. The new tanks should be home of pinguines and polar bears. Especially the bears' sharp claws in particular required a particularly abrasion-resistant and scratch-resistant coating
The final layer was sprayed with Jekto screw pump M 6.