Doyma: Curaline Cable Ducts

The Curaline® cable penetration systems BKD and KD are quick and straightforward gas and pressing watertight ducts for cables and cable ducts. All cable diameters are simply and flexibly sealed. Rounded edges of system components ensure cable insulation is not damaged when cables are pulled through. Curaline cable penetration systems comprise watertight sleeves and a variety of cable adaptors. Heat-shrink shrouds with heat sensitised adhesive provide the pressure seal between the adaptor spigot and the cable.

Leakproof sleeve

Leakproof sleeves are installed single or double ended, either individually or alongside each other as a battery. By the innovative combination of an expanding seal system and a flanged sleeve, the system ensures a secure bond in the concrete. Both the BKD and KD systems are delivered to site in the correct length to suit the structure thickness.

Cable adaptor

The cable adaptors offer versatile solutions for sealing cables and cable ducts. The BKD cable adaptor, with its bayonet lock system, offers even quicker and easier installation. The KD system cable adaptor has a screw-thread slip ring and offers the same properties as the BKD system. Cable adaptors allow cables of various diameters to be ducted. Heat shrink shrouds are supplied as standard; shrouds using cold shrink technology are optionally available.

Curaline® KSS cable duct system

The KSS cable duct system offers a variety of application possibilities. As an example, the gas- and pressing watertight connection of two buildings using the KSS duct system is readily achievable.


The KSS system is a flexible, mechanically strong, load bearing plastic spiral duct. The duct is connected to the leakproof sleeve using either a bayonet or a screw-thread adaptor.


According to installation requirements, a variety of components is available for connecting the duct to the cable adaptor.

Curaline system materials

Both the BKD and KD systems are manufactured from PC (polycarbonate), ABS (acrylonitrile butadiene styrene) and PVC-U (polyvinyl chloride). In addition, the solid rubber gasket in EPDM (ethylene propylene di-monomer).

Curaline® Building earthing

Building earthing GE is supplied in both rigid and flexible versions for ducts and retrospective grounding.