Cable and pipe penetrations such as electrical, water and data cables, must be permanently and securely waterproofed against penetrating water. Typically, rigid mortars or foams are used, which prevent the installation of other cables.
Using KOSTER KB-Flex 200, a permanently plastic material, is a robust and easy way to waterproof against penetrating water while allowing the installation of further cables at a later stage. The material accommodates cable movements, does not tear, and is permanently resistant against common substances found in soil and groundwater.
Before applying the material the substrate must be clean and free of loose particles. The substrate can be dry, moist or wet. In cases of pressurized water, a backing is installed in the penetration at a depth corresponding to the installation depth (1.5:1 / Length x Thickness) using a common PU foam. It is important make sure all voids are filled during installation. Finally the sealing compound is recessed approx. 1 cm from the wall surface as protection against mechanical damage and to secure the position of the cables.
KOSTER KB-Flex 200 has good adhesion to all commonly used building materials such as concrete, masonry, mortar, plaster, brick, and all other mineral construction materials, as well as ceramic, PVC, polyethylene and polypropylene. A primer is not necessary.
Always adhere to the specifications in the respective Technical Guidelines.