From Cakecentral you can read ycknits answer if you scroll down, and I've also copied and pasted it below:
"PLEASE don't use vinyl or other plastic sheeting that is not approved for food use to roll out your fondant! The problem with these materials is that they contain polymer free-radicals.... the crafty little polymer molecules that managed to avoid connecting with other molecules during the chemical reaction process that produced the vinyl or plastic. The "bad" thing about polymer free-radicals is that they are organic compounds and react very well with the organic molecules in our bodies! Many of them (in higher concentrations) have been identified as carcinogens or are materials to which people develop severe (i.e. lifethreatening) allergies at some level of exposure. A simple example of un-reacted polymer molecules that we can all relate to is the "new car" smell that is due to the unreacted chemicals in the plastics in our cars. The haze that forms on the inside of the windshield in a new car is the same thing. These chemicals are also present in vinyl sheeting.
Silicone is inert.... ie no free-radicals to react with our bodies. Some plastics are okay'd for food use... i.e. soda bottles, water bottles, baby bottles, plastic storage containers, etc. Vinyl is absolutely NOT safe for food-related uses. Plastic tablecloths are NOT vinyl.
I'm a chemical engineer with 35+ years of experience in polymer and pharmaceutical operations. I don't want to offend anyone - just inform."
As for the comment on the rolls of vinyl showing it as being used over a tablecloth, I would think that just because something is used to cover a table would not guarantee that it is food safe. A tablecloth is meant to set dishes on, not set food directly on it. I know some people use plastic tableclothes to cover their cake boards but how do they know that they are food safe?
I bought the vinyl from Wal-Mart to use for rolling fondant but after looking at all the articles about vinyl online, I am not going to use it. I'm not going to take any chances especially since I make alot of kids cakes. It makes me curious as to why so many people have a problem with using cellophane gift wrap that is labeled not food safe but they use this kind of PVC vinyl to roll fondant out,which would mean the whole fondant could be contaminated, not just a bottom border on a cake.
I saw that mat online and I think that is the safest way to go. Thanks for the input on how good it works. I watched the video and it seemed like it would be something that would really be helpful in working with the fondant. I have a local cake decorating store that stocks alot of products so I'm going to see if maybe they have it or can order it cheaper. Too bad Michaels doesn't carry more cake decorating supplies.
I am also going to order my mat. I was so scared to try to cover a cake with fondant the first time but when I got the courage to do my first cake, I was hooked! Now I would much rather cover a cake with fondant than deal with trying to get buttercream very smooth and then dealing with all the little damages the buttercream gets while decorating or transporting. My husband and I have been trying to come up with a name for my cake business and while decorating a castle cake yesterday and dealing with all the problems with the buttercream, I told him I think I will name the business "Buttercream Sucks!"...of cource I was joking but to me the fondant is so much easier and you can do so many cool things with it. So get even more fearless with the fondant!!!
If the fondant drives me real crazy, I just make a 4" high strip of fondant and place it around the cake and then decorate the heck out of the top with interesting swirls, and interesting border top and bottom and add a gumpaste plaque ( I make a few for just such occasions) with the appropriate greeting..
My other "trick" is to buttercream the sides of the cake and put a drape of fondant on the top..I make an odd shape edge on the fondant to give it the "artistic" look and tell the custome "it's all the new rage".
The way I figure it I have nothing to lose by trying something different..
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