The PENTAFLEX® STK sound-insulating cage is part of the PENTAFLEX® joint sealing system designed for the construction of water-impermeable concrete structures (white tank). The two-part sound-insulating cage is mainly used in semi-detached and terraced houses and is used both in element wall construction and in-situ concrete construction. It separates the solid components and thus prevents flanking sound transmission in the external walls. The sound insulation joint strip seals the joint against pressing water.


  • Reliable sound insulation
  • Sound insulation tested
  • Secure sealing of the joint
  • Simple and reliable connection to the PENTAFLEX KB® seam sheets by means of the PENTAFLEX® joint tape connection

Technical Details

  • Sound-insulating cage consisting of hydrophobic soft fibreboard with integrated steel retaining stirrups