Airtightness, insulation and weather protection all from a single source

Our ISO³-WINDOW SEALING SYSTEM provides the suitable sealing solution for many connection situations. Our quality-tested system products meet the stringent requirements of the Building Energy Act (EnEV was valid 31.10.20) and the recommendations of the RAL-Gütegemeinschaft Fenster und Haustüren e.V. (RAL Quality association for windows and doors) in the “installation guide”. Our products can be processed easily, quickly and safely, saving not only energy but valuable working time as well. All the products have been coordinated perfectly in terms of function and application and can be used in any combination.


The system includes a range of window connection films for time-saving and air tight sealing, as well as permanently elastic, impregnated PUR sealing tapes which serve as weather protection as well as being used for thermal and acoustic insulation. In addition, we can also supply you in front of wall installations with multi-functional joint sealing tapes which combine all three functions in one product. Furthermore we also supply sealants and PUR-foams.



A powerful sealing system all-round

  • 10 year functional guarantee*

  • reliable 3-level sealing

  • one-stop shopping for a complete system range

  • product components are optimally matched to one another

  • short delivery times reduce your planning times and storage costs

  • effective protection from energy costs and structural damage

  • energy efficiency proved by Environmental Product Declaration (EPD)

  • product quality inspected regularly by independent institutes

  • competent support through our service team

*according to manufacturer's conditions (available on request).


Efficient 3-level sealing in accordance with RAL “Installation guide” with the ISO³-WINDOW SEALING SYSTEM

inside: air tight

Level 1: Separation of internal and external climate

The penetration of humid room air into the structure is prevented by this level, thus preventing condensation of this humidity at points where surface temperatures are below the dew point. Air tight sealing products are fitted to prevent uncontrolled heat loss and drafts via the connection Joint.

middle: thermal and acoustic insulation

Level 2: Functional area

Thermal and acoustic protection are guaranteed by this level. The functional area must remain dry and must not be subject to condensation from the room side nor driving rain from the outside. 5 % humidity can reduce insulation by up to 50 %. Our product solutions do not permit this to happen.

outside: rain tight

Level 3: Secure weather protection

Level 3 must be designed to resist driving rain, as a wind and rain barrier. Driving rain values of at least 600 Pa are usually required; these are achieved or even significantly exceeded using sealing solutions from the ISO³-WINDOW SEALING SYSTEM.

In front of wall installations
Inner Sealing Level
Middle Sealing Level
Outer Sealing Level
Complementary Product
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  • products


We can help you find the ideal product for your requirements.

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We can give you tips on processing our products and help with our know-how.

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