I DONT CARE ABOUT THE MOLDS THEMSELVES!.. I am not making 'chocolates'..
All right, I think we all got it here. Just bear in mind that rigid materials used for castings, such as resins, are also used for molding!. The same as materials that are used for molding, such as rubbers, are also used for casting. I understand your question perfectly from the start and I know you are not into chocolates.
So, again, most surely there are materials that are food-safe, and most probably nothing will happen, BUT, if there´s no certificate, it´s you who will not be safe using it. The fact that there is no certificate doesn´t necessarily mean they are not food safe, just that the manufacturer hasn´t sent it to a lab to get a certificate. Probably because (and these things can be expensive) he sees no business in it, and probably because most of the food safe stuff is mass produced with the proper injection plastic etc. that does have the certification because it´s worth it.
Or maybe, as I said above, the "user-friendly" materials we use are not stable enough, can be porous or not depending on how they were handled as there´s no control upon us when we are working with them in opposition to what happens in industry.
Who knows, there might be something around...or not.
I know this doesn´t help, just trying to point out the reasons why you are having trouble finding this.
Would a hard rubber work?, and I know, you are not looking for molds, but as said rubbers are also used as casting material.
Smoothsil 960 (smooth on) is very close to a plastic (that would be 70 onwards Dshore hardness). And it´s food safe (or at least they say so). I´ve used it recently and it´s pretty hard, in the limit between a rubber and a plastic. Don´t know if it will stand the pressure without distorting, maybe redesigning could make this kind of material work.
Shore 60A Hardness Platinum Cure Silicone
www.smooth-on.com
