Alternative window sill sealing instead of silicone

Next week, windows will be installed at our place. Since it is a double-shell masonry, the windows will be placed directly on the masonry. Is there a rubber seal that is installed before the window installation, so that subsequent sealing with silicone can be omitted?

Compression tape + window film

Silicone joints are maintenance joints and have no place in window installation. Not on the outside and certainly not on the inside. Silicone is often used on the outside, but that doesn't make it any better.

On the outside, the sealing can be done with the mentioned "Kompriband". A rainproof, windproof, diffusion-open, one-sided (on the window) self-adhesive, fully filling sealing tape is applied between the window and the outer wall shell. Special attention must be paid to a continuously tight execution at the corners. Alternatively to the rebate from the inside on the outer wall, the sealing can be done by strips equipped with this very tape along the reveal.

The thing with the compressible tape and the foil is already clear to me. I am only concerned with the lower part of the window which rests about 2cm on the windowsill. Of course, I could also glue compressible tape here so that the window stands on the compressible tape, but there will definitely be a small gap because the windowsill is installed with a slope. Hope I could explain it understandably.