oh sorry I worded that wrong, I meant like I used flexible drying silicone as my whipped cream and I don't want it to be, i'd rather it be hard so it won't get damaged.

The squishy factor of the silicone actually makes it more durable, if you want something stiffer use the piping clay you can find @ Sophie & Toffee, it does have a tendency to crack a little when it dries.

I will post link to that product tomorrow.