Window sealing

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

Sealing windows - sustainably and professionally

InnoElast® – the new generation sealing technology

At the latest when the house, apartment or garage is to be completely renovated or refurbished, every do-it-yourselfer is faced with the question of how to reliably seal the many different types of windows. Once the windows are exposed, they almost always reveal an unsightly sight. Often the sealant is porous, torn and adheres to the window in a leaky manner.

Especially against the background of optimal thermal insulation, skylights, basement windows and house windows should be reliably sealed. Here, B.T. innovation offers an excellent solution with the InnoElast sealing system.

Sealing windows with sealants from B.T. innovation

The newly developed InnoElast sealant is suitable, among many other applications, for sealing connections on windows and doors as well as other areas of a building. With its very high adhesion, it can be used indoors as well as outdoors. InnoElast is permanently elastic as well as extremely low-shrinkage and can be used in conjunction with a wide variety of materials. Glass, wood, concrete and much more – InnoElast® solves your waterproofing problem.

  • InnoElast® is practically not shrinking
  • seals permanently due to its elasticity
  • Fills space flexibly and completely
  • very resistant and workable from -3°C
  • InnoElast is applicable against pressing water
Fugenabdichtung Haus und Garten


InnoElast® is applied to a clean substrate, which must be free of dust, grease and oil. InnoElast® is filled on this by means of a tubular bag gun and then cures effectively. Curing is 2-3 mm per 24 h, at a room temperature of 23°C and humidity of 50%. The skin formation time is 2-3 hours for InnoElast® Type 1 and 15 minutes for InnoElast® Type 2 under the same conditions.

When installing the window for the first time, pay attention to high-quality window sealant

Skilled craftsmen are not afraid to build their own bungalow, tool shed or even a garage. Those who pay attention to proper window sealing here from the beginning can increase energy efficiency and thus save on heating costs, avoid leaky windows and ultimately do not have to renew or replace windows. The ambitious builder therefore thinks twice before using a high-quality sealing material (for example, a high-quality joint sealant, joint putty and joint tape) or just normal silicone from the hardware store to seal his windows.

Wooden windows can be sealed with silicone, but for windows made of aluminium, PVC and other materials quickly arise doubts about sealing with silicone. The material of the windows to be installed should therefore be taken into account when choosing the sealant. Otherwise, there is a risk of significant defects after a short time. It is important to consider not only the lack of insulation against cold, but also noise protection, paintability and protection against the penetration of moisture.

Even those who do not build themselves, but let build, should ask what substance is used for window sealing. If savings are made in the wrong place, high costs may be incurred due to repeated and frequent renovation of the windows. Especially with skylights, this can become a costly endeavor.

Over the years, defects and signs of wear and tear on the house and yard are hard to avoid. Those who live in their own home usually have to pay for the necessary renewals, building structural sealing and renovations themselves. Windows in particular are a delicate matter that not every do-it-yourselfer dares to tackle themselves. A comprehensive window renovation should finally lead to the fact that the warmth remains reliably in the house and noise and cold do not find entry into the home four walls.

When renovating windows, many people immediately think about their complete replacement. However, quite often they are perfectly fine, and the existing defects result from a porous and cracked insulation material. Although the windows have to be temporarily removed for refurbishment, they can be reinstalled afterwards. For renovation, the old insulation material must be completely removed in order to be able to achieve an ideal connection between the window frame and the new window insulation when reinstalling the window.

An important point to consider when installing windows is the age of the house. In old buildings there are usually more problems and peculiarities than in new buildings. Furthermore, when choosing the window, as well as insulation, it is necessary to consider the environment in which the frame is used. Window sills inside and outside require that the window must be used special. This also changes the gaps into which moisture or cold can penetrate. However, the insulation material used must always seal reliably, regardless of the distance between the window frame and the masonry. Although, in principle, any homeowner can independently renew the window seal, but in case of uncertainty should always consult an expert.

The permeability of windows due to poor sealing can occur throughout the year, but most often this problem is noticed only in cold weather due to the drafts that occur. Especially when the material is stressed by frequent alternation of warm and low temperatures, leaks often appear on the window, which then become noticeable during the cold season. Although windows can also be renovated subsequently during the winter period, the renovation must then be quick and the sealing material must harden in a short time. In addition, the sealant must also be processable at temperatures beyond the 0°C mark.

Not every fabric can withstand these conditions, so for such important work in uncomfortable seasons, special attention must be paid to the quality of the building materials used. Inferior window seals at most help to survive the winter, but no later than spring inevitably follows the replacement of windows and the elimination of defects. But no matter whether replacement or renovation – when installing the windows should be used only high-quality sealant.

Those windows that need to withstand the weather conditions the most should be sealed with special care.

Thus, the roof windows must be able to withstand stronger and more frequent wind and rain. This is especially true for sloping roof hatches. Here can quickly form places where the rainwater accumulates and drains slowly. An inferior sealant therefore often fails after a short time during harsh winters and rainy months, allowing moisture to enter the structure and cause damage.

Especially in buildings with thinner exterior walls, mold therefore often forms and is difficult to combat. Also, in general, detached houses have to fight more with the weather – this should also be taken into account when installing the windows.

Windows in the cellar are usually smaller than roof windows, but here the weather conditions must be taken into account to the same extent. For example, cellars that are not developed often have high humidity. This can damage the window frame and window insulation not only from the outside but also from the inside. Although thermal insulation is less important in unoccupied cellars, penetration of moisture through the windows into the masonry there can cause considerable damage (see cellar sealing). In the worst case, the wetness moves up into the living area and can cause mold.

Therefore, cellar windows should also be installed with special care and sealed against moisture.

Scroll to Top