Window sill connection strip cold bridge?

If you google it, only Polish websites come up... Is there no German product? Or is it only done by the Poles? I've never heard of it...

As far as I know, a Polish manufacturer patented Klinaryt. Technologically speaking, it is a very strongly compressed EPS. I found this quickly on the internet.

There are also Purenit sleepers. These work on the same principle. However, they are somewhat more complex to process on site.

Our windows came from Poland, so Klinaryt was installed.

Damn, - I made a typo in my previous message...

But 0.35 is not much better than the standard widening profiles, is it? They contain XPS with 0.30-0.35...

0.35 is neither better than a aerated concrete or Poroton insulation brick, nor than the construction foam that the window sill botcher fires underneath until it smokes.