I’ve made a silicone mould of a thin part (roughly 1mm thickness 100mm long)

Mixed the px90 at 1:1 ratio, and poured it into the mould.

3hours later I went to demould it and it’s super flexible (I can scrunch it up like paper) and I can rip it !

Isn’t the px90 supposed to be hard ? Is my part too thin to use px90?

Thanks