I have read on some regular silicone bottles from home depot that this silicone was approved for food use if cured for 72 hours in a certain temp range or whatever. I was suprised to read it in the fine print on the bottle. If I remember right it was a clear bottle of GE silicon II is what it was called, but always check on the bottle.
Here is a quick google search of a thread that corroborates what I found, that the pure 100% silicone ge Silicone II is food safe. Anything with none of the anti microbials and such should be, as long as its pure silicone with just as solvent that cures out. I would trust anything like that myself.http://forums.morebeer.com/viewtopic...8fa0fbdf3c2b15