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  3. Roxtec knock-out sleeve

Roxtec knock-out sleeve

Sleeve with knock-out plate for sealing prior to cable and pipe routing.

The Roxtec knock-out sleeve (KOS) keeps your building dry during and after construction, and provides spare capacity for future needs. The sleeve is easily fixed and cast into structures of varying thickness and ensures a tight seal until its plate is knocked out for cable and pipe routing and sealing. The sleeves have an integrated feature which allows them to be connected into space efficient clusters.

  • Light-weight
  • Area efficient
  • Quick and easy to install
Roxtec knock-out sleeve

Ratings & certificates

Certificates are continuously added, renewed and replaced, please visit regularly to ensure compliance.


  • N/A


  • Gas: 0,3 bar
  • Water: 0,3 bar
  • IP 68



Structure of installation

  • Concrete & brick

Mounting type

  • Casted

Installation instructions


Sealing component data

Here you find technical information about each specific part of our system.

Round frames/seals

Configure your own transit kit

Select your set of sealing modules