We can see silicone in its nature is safe, the main concern lies in the filler added.
1. Fillers were added to the raw silicone material.
As a man-made polymer, silicone rubbers have exhibited excellent properties, such as thermal conductivity, fire resistance, good chemical stability, flame retardancy, and excellent resistance to heat and cold, etc.
By changing the base polymer, adding reinforcing filler and special additives, parts of properties will be strengthened significantly to meet special application needs. In my other post on Silicone Classifications
, you can know more about them.
As for what fillers and how many were added, we have no idea about it, the material suppliers won’t tell you too, because it is technical data, it’s their trade secret. We, as silicone product manufacturers, buy raw silicone material from them and will require them to offer FDA or LFGB test reports, to prove their material is food safe. Material suppliers are liable for material safety.
2. Next is our molding production stage, two kinds of filters we added include color pigment and vulcanizer agent.
The cool and bright colors make silicone cookware attractive but also cause concerns. Many customers worry the color agent may be harmful to our bodies. We understand their concern, but don’t worry too much about it. Because the portion added is rather small, even negligible, normally 0.1% ~1%. SGS test report on Cd, Pb, and Hg is available too.
Another filler is a vulcanizer agent, the widely welcomed platinum silicone is one of them. Platinum is one kind of vulcanizing agent we add to silicone material for molding production to convert silicone gel material into solid high elastic silicone rubber.
Compared with a normal vulcanizing agent, the Platinum agent has no odor, no residue after cure, and it’s faster and safer. The vulcanizer volatilized under high temperature, sometimes a small portion of residue left, that’s why some products have a smell, a post-cure can get rid of them, don’t worry about it.
Although some consumers still wonder if there are any dark sides to silicone cookware, it can be 99% sure that silicone is much safer than many toxic plastics, both for humans and nature.