The substrate must be solid, dry, clean and free of substances that may impair adhesion. A few isolated cracks in the screed do not cause a problem as long as the crack edges are level. Before applying the CL 69 membrane, pipe penetrations as well as wall and floor connections (gullies etc.) should be waterproofed with the prefabricated Ceresit system components. It is important to seal the connections with FT 101. Butted joints should be avoided. Refer to the Technical Data Sheet and working description!
CERESIT CL 69 ULTRA-TIGHT MEMBRANE
Features and Benefits
Crack bridging 3-layer film for waterproofing and uncoupling membrane
- Waterproof / vapour - retarding
- Chemical resistant
- No drying time, rapid work progress
- For use on walls and floors
- For indoor and outdoor
Crack-bridging, 3-layered waterproofing and uncoupling membrane CL 69 Ultra-Tight is a trouble-free alternative to liquid-applied waterproofing products for the composite waterproofing of balconies and terraces and wet rooms. It ensures rapid work progress. Due to its uncoupling effect, CL 69 is suitable for the installation of ceramic tiles and slabs on critical substrates as well as for the removal of tile coverings.