Which PU foam is suitable for low-energy or passive construction?
For low-energy and passive homes, a PU foam is required that not only insulates well, but also remains permanently flexible and airtight.
Parafoam Flexible NBS
Parafoam Flexible NBS has been specially developed for applications where movement may occur around windows and doors. The elastic foam absorbs stresses, prevents cracking and ensures durable thermal and acoustic insulation. This makes it particularly suitable for energy-efficient building concepts.
Parafoam Low MDI NBS
Parafoam Low MDI NBS combines high and lasting flexibility with a very low content of free isocyanates (less than 0.1%). As a result, it is exempt from mandatory PU training and ideal for safe, durable sealing in low-energy projects.


Both foams contribute to an airtight connection, limit heat loss and support the building’s energy performance.