Fire-resistant penetration seals

Openings in walls and ceilings constitute a major threat to the spread of fire to adjacent spaces. According to the Royal Decree of 7 July 1994 laying down basic fire prevention standards, penetrations through walls of liquid or electrical conduits must not adversely affect the required fire resistance of the building elements. The fire-resistant sealing of such penetrations must therefore meet these requirements, using the appropriate seals for the different types of ducts. The sealing of this penetrations is therefore professionally carried out by our specialists. After completion of the work, the work is also sealed by applying a sticker.

Our sticker on fire-safe penetrations

UNDER NO CIRCUMSTANCES should the duct be sealed with fire-resistant PU foam. This is a common problem where many people think to quickly seal the duct with fire-resistant PU foam but that is INCORRECT. The fire-resistant PU foam will be gone in no time in case of fire.


Sealing penetrations correctly is complex because the different types of penetrations or pipes require a different sealing technique, so this can only be carried out by specialists.

Some examples of the fire-resistant penetration seals.

  • Metal pipes will not melt immediately but in case of fire they will transport high temperatures through the wall or the ceiling causing materials in the adjacent room to ignite.
  • Plastic pipes will melt quickly and thus leave an opening in the wall or the ceiling through which the heat and the flames can travel to the adjacent spaces. These pipes must also be sealed in accordance with certain requirements. Therefore, fire resistant sleeves must be installed to seal the opening created during the fire.
  • Electric cables catch fire. These cables must again be sealed according to certain requirements. By placing flexible strips it must be ensured that the fire cannot get through the penetration.
  • Holes, joints and cracks must also be properly fire sealed.
  • It becomes even more complex when different types of ducts take place in one opening and there is combined flow.

It is a must to pay sufficient attention to the penetrations to avoid the following problems:

  • All techniques are pushed through the same opening so that a correct seal is no longer possible.
  • Seals are forgotten, which compromises approval.
  • Incorrect techniques are used, resulting in problems during approval or inspection.

It is desirable to make an inventory of the penetrations, if necessary, with photographs in the post-intervention file. It is then possible to check afterwards whether changes have occurred in relation to the initial situation.



If you have any questions, please click here to request more information or for a non-binding consultation!


WEVAHO BV - Lange Ambachtstraat 2 - 9860 Oosterzele, België
Tel: 09/362.82.66 - Gsm: 0475/91.21.32 -