34 Under sill profile Black

Nyxon Black under sill profile is a universal product that can be used in joinery. Its features include:

  • Improves the window assembly process, especially in its precise setting
  • Tightly insulates, while improving the thermal parameters in the area of connection of the window with the wall
  • Can be adapted to any window profile
  • Moisture resistance
  • Very good mechanical properties
  • A wide range of available widths
  • Minimizes thermal bridges formed at the interface between the window and the wall

  • It enables quick and precise installation of window sills

Compared to the PVC under sill profile found on the market, Nyxon Black under sill profile are characterized by much better thermal parameters. The mechanical properties are good enough to serve as a structural element that carries the weight of window joinery.

Milled strip for frame profile, beam length 1300 mm


The Nyxon Black sub-sill profile is fully matched to the window profiles. We have models adapted to all manufacturers of PVC, aluminum and wooden windows. We make moldings for specific projects of woodwork producers. Each strip on its upper surface (the part on which the window is mounted) has a groove that allows for sealing the joint between the strip and the window. For this purpose, we recommend using an expanding tape (PENOSIL Expanding Tape) selected according to the gap between the strip and the window profile. In the case of a very small gap (1-2mm), we recommend using a sealing adhesive (Nyxon Special Glue). This product can also be used to connect subsequent sections of the slats and to stick the slats to the wall.

Do you know?

To reduce heat loss, the window alone is not enough. The basic issue is the installation method. Window manufacturers equip their products with window moldings. These elements are made of plastic with good mechanical properties, but the thermal parameters leave much to be desired. Replacing the standard PVC under sill profile with the above-mentioned Nyxon product improves the thermal properties of the window-wall connection. Energy-saving window “armed” with a Nyxon window strip gives us additional insulation improvement at a low cost.