Silicone Rubber (Mold Max 30)

This tin-cured silicone rubber is far less stretchy than its polyurethane counterpart. If you look closely you can see that this sample has cracked from being over-strained. Unlike some of its neighbouring polyurethane rubbers, this silicone rubber is extremely inert and hasn't been discoloured by UV light or ambient moisture, retaining its original vivid powder blue. Because silicone rubber flows easily and can be moulded, pressed or extruded using relatively low amounts of energy, it is a useful material for tinkering and making prototypes without specialist equipment. It is generally non-reactive, stable, and resistant to extreme environments and temperatures (from about −55 °C to +300 °C) so can be used for a huge variety of things, from cake baking trays to medical implants.