Seal wall penetration

Technologien und Beratung für den Betonbau - B.T. innovation

Sealing wall penetration with B.T. innovation

Each building will be equipped with energy and utility lines such as gas, electricity, water and communications. The penetrations take place through the wall, a wall or, in the case of a basement-less building, through the floor. However, these incoming and outgoing lines represent points of attack for moisture penetration. In order to be best prepared against wetness and moisture at the very beginning of the construction process, the planning should be carried out with care. Subsequent improvements to problem areas are possible.

BT sealing products are excellent for this purpose:

  • To seal the penetration of an existing building permanently and effectively
  • Reliably sealing wall penetrations and breaches at a later date
  • Sealing leaking joints & complex connections between bushing and wall
Mauerdurchbruch Anwendungsbereiche

In the case of penetrations, it is important that built-in parts and media penetrations such as pipes, brackets or cables, which penetrate the sealing, are connected as firmly as possible to the component. Typical systems used here are fixed flange collars, fixed bushings but also elastic connections. The built-in parts and media penetrations can then be connected to the existing sealing. Movements occurring between the penetration and the component, for example due to thermal deformation, place additional demands on the sealing. This is because the sealing must be able to absorb the corresponding movements in order to be permanently effective. For this purpose, B.T. innovation provides various products that simplify sealing.

Mauerdurchbruch abdichten Schritt 1

Step 1

Mauerdurchbruch abdichten Schritt 2

Step 2

Mauerdurchbruch abdichten Schritt 3

Step 3

Mauerdurchbruch abdichten Schritt 4

Step 4

BT solutions for sealing wall penetrations

InnoElast® – Effective sealing of leaking joints

Leaky joints between the duct and the wall can be permanently sealed with InnoElast® Type 1, and against pressing water with InnoElast® Type 2.

Advantages of InnoElast® Type 1

  • Solvent-free
  • low-shrinkage
  • Applicable on damp substrates from -3°C
  • Weather and UV resistant
  • Permanently elastic
  • Up to 25% motion absorption
  • Applicable without primer

Advantages of InnoElast® Type 2

  • Solvent-free and low shrinkage
  • Applicable on damp substrates from -3°C
  • Weather and UV resistant, high resistance to chemicals
  • Permanently elastic
  • Up to 10% motion absorption
  • Applicable without primer
  • Pressure waterproof up to 0,48 bar
Fugenabdichtung Haus und Garten


Using a tubular bag gun, InnoElast® Type 2 is applied to a clean substrate and then cures effectively. The skin formation time is between 2 and 3 hours (type 1) and 15 minutes (type 2) at a room temperature of 23°C and humidity of 50%, the curing time is 3mm in 24 hours. A primer is not required beforehand. However, it is recommended to insert a joint filler cord and tape the edges. Pressing and smoothing creates a strong bond with the joint edges.

When do I decide on InnoElast® Type 1 and when on Type 2?

InnoElast® Type 1:

  • for movement joints with movements up to 25%
  • for joints that are only sprinkled and where no water pressure is applied

InnoElast® Type 2:

  • for joints exposed to chemicals (acids, alkalis, selected fuels)
  • for joints exposed to pressure water up to 4,8m water column
  • for joints that are adjacent to bituminous materials / coatings and should be tight.

Instructions - Processing as a joint sealant

ProElast® – sealing simple transitions and damaged surfaces

Simple transitions to surfaces are sealed by the ProElast® system of film and film adhesive.

ProElast® System – Advantages

  • Pressure waterproof up to 2 bar
  • Application on damp, ice-free substrate from 3°C
  • Weather and UV resistant
  • With InnoElast® type 2 = high chemical resistance
  • Applicable without primer
ProElast Referenzen 3


After applying InnoElast® adhesive to a clean substrate, it is spread by means of a notched trowel. The sealing film is then glued centrally over the joint so that no air bubbles remain. The edges are then sealed with InnoElast® Type 1 or Type 2. Short curing times enable fast further work. The skin formation time is 2-3 hours for InnoElast® Type 1 and 15 minutes for InnoElast® Type 2 at a room temperature of 23°C and a humidity of 50%. Within 24 hours, a layer thickness of 2 to 3 mm, at a room temperature of 23°C and humidity of 50%, cures effectively. In this way, you reliably seal construction joints, predetermined crack cross-sections and movement joints.

Instructions - Processing as surface sealing

LiquidElast® – for sealing complex joints

Complex connections can also be sealed with paintable LiquidElast® Type S.

FlaechenElast Anwendung Teaserbild

LiquidElast® – Advantages

  • Pressure waterproof up to 1,0 bar
  • Wear resistant and resistant to many chemicals
  • Applicable on damp substrates from 0°C
  • Crack-bridging up to 5 mm
  • Permanently elastic

Instructions - Processing as surface sealing

Subsequent sealing of penetrations

If the penetration of an existing building is not adequately sealed, it can cause significant damage to the building fabric and force extensive moisture damage remediation. However, higher value uses may also force subsequent sealing of existing penetrations. In addition, sealing against the harmful gas radon is often a necessary renovation case.

Seal wall openings in the form of drilled holes

It is necessary to seal the places adequately not only in the case of larger wall penetrations, but also in the case of smaller boreholes. These are designed to protect the walls, masonry, as well as the building from the penetration of moisture and can be done even by less skilled do-it-yourselfers. As soon as a borehole is no longer needed, you should seal it as quickly as possible.

Our tips and tricks

During the rehabilitation works it is recommended to pay attention to weather conditions. After all, to carry out work on the cellar walls, ceilings or floors, calm and dry weather is advantageous. Any installation parts (e.g. pipes, cables, brackets) must be carefully incorporated into the sealing layer. If it is foreseeable that thermal deformations may occur in the transported substances in the pipes, the sealing should include leeway for movements of the pipes. Pipelines are connected to each other by means of a flange. As a rule, the ring-shaped washer is attached to the end of a pipe and ensures absolute tightness with its flange seal.

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