AF Cover String

Fire protection system for small service installation penetrations

AF COVER STRING is certified to protect small service installation penetrations in false ceilings, including electrical cables, corrugated pipes, suspension chains, threaded rods, etc.

Weight: 0,20 kg /nr
Price: €10,80 /nr

Choose the quantity (nr)

Technical Features

AF COVER STRING is a rock-wool cylinder covered with aluminium foil with a longitudinal cut that enables its opening.

  • Appearance: cylindrical rock-wool element covered with aluminium;
  • Inside diameter: 30 mm;
  • Outside diameter: 70 mm;
  • Height: 50 mm;
  • Weight: 16 g/pc;

Direct Application

  • Mixed systems in REI mineral fibre false ceilings;
  • Mixed systems in EI membrane false ceilings.


    • Class REI 120 (EN 1365-2) reinforced concrete floor protected by a fibre false ceiling;
    • Class EI 120 (EN 1366-3) membrane false ceilings.

    Packaging and Storage

    Cardboard boxes.
    The product remains unchanged if kept under normal storage conditions.


    Supply and application of AF COVER STRING firestop protections consisting of an aluminised rock wool cylinder and AF SEAL W fireproof sealant for REI 120  requalification of fireproof composite, and EI 120 membrane false ceiling containing small penetrations.

    Application Method

    1. place AF COVER STRING around the element to be protected in the false ceiling;
    2. place the element in the false ceiling;
    3. inject the AF SEAL W sealant into the cylinder until it is filled.

    Reason to choose AF Cover String

    low weight;

    suitable for the protection of small passages;

    easy to install.



    Do you have a special need? We can offer you the Solution that best suits you!

    If you did not find what you were looking for and/or if you need further information, do not hesitate to call us at +39 0298879353, or fill in the form below