Few years ago I dropped the sump on the Skywing and in the process realised the engine mountings were split. I considered casting new ones from eurethane. IIRC there was a window sealant made by 3M that people had used for suspension bushes with success.

If its good enough for that, should be good enough for bump stops, and they won't be functionally tested for the MOT, just have to be there. If its a complex shape you might need a genuine example to mould from, though.

In practice my temporary lash up with cable ties has held, so I never tried to source the material, which would likely have been difficult or impossible here anyway.

I did, however, try and use a (silicone?) rubber sealant to make a female mould for something else. While that was unsuccessful, because I couldnt get the object to release, the black sealent seemed pretty tough, wasn't expensive and would probably have been adequate for bump stops

Edited by edlithgow on 06/09/2021 at 11:58

It probably is that simple.

Not familiar with Kong dog toys, but if they are about the right size and will bolt in place they'd probably do.

Probably have to be black though.