Strands: Longitudinally watertight strands

Environmentally friendly, water-sensitive threads caulk up the joined strands against a pressure of up to 60 bar upon humidity longitudinally penetrating. Thus, LEONI offers a green alternative to other solutions involving silicone.

The aforementioned threads operate on the basis of a “super absorbing polymer” (SAP). This material instantly starts to swell at the point of water entering, thereby immediately sealing up cavities and preventing water from further progressing into the cable. In doing so, any damage caused will be restricted to a very limited magnitude.


  • Shipbuilding (civil and military)
  • Submarine cables
  • Computer keyboards
  • Car wash installations
  • Energy cables
  • Control cables

Particular benefits for our customers

  • Silicone-free material
  • Very clean production and processing
  • Reduced weight
  • Environmentally friendly

Manufacturing range

  • Materials: Cu-ETP1 and Cu-OF1
  • Bare, tin-plated, nickel-plated, silver-plated
  • Left-hand lay or right-hand lay
  • Variation: soft annealed
  • Single wire diameter: ranging from Ø 0.05 mm to Ø 0.51 mm
  • Cross-section: ranging from 0.03 mm2 to 16 mm2

Other dimensions and materials

You need special designs and products for your applications?

Our R&D team is your partner for customised solutions.

Please contact!

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