It has worked out at about $2.10 per plaster mould made. Maybe that is reasonable value, I'm not sure. The strength is OK but I have had much stronger silicone rubbers before this. The thixotropy could be a bit higher so that it is not necessary to invert items a fewn times early in curing. (Maybe faster curing type would suit a person like me better)
There does not seem to be a recommendation for a clean-up solvent included with the packaging or MSDS.