We used this technique for the nut of a parasol base, among other things. It now has more clamping force on all the different parasol poles out there. All those different shapes and surfaces of poles need to be "absorbed" in order to stand firmly in the parasol base. This is possible with this 2K solution. And because we allow the second component (the rubber) to run through to the outside, it also looks very nice.
2K injection moulding also becomes very functional when it provides technical products, such as this bend of a flue gas outlet, with a seal. That saves another rubber ring that has to be assembled separately.