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Silicone rubber has historically been used in specialty applications in order to meet requirements other elastomers cannot. Silicones have the largest application temperature span of all rubbers (-120 F to 500 F, with one or two exceptions where highly specialized and costly Fluoropolymers can compare). Their chemical structure allows Silicones to be the most benign of all rubbers in medical applications (again, the exception are some very costly Fluoroelastomers). Cytotoxity tests of Silicone parts made with simple formulations show no adverse effects. The US military applies the longest shelf life criteria to Silicone rubber components. For example, a coolant hose made with Silicone meeting SAE J20, is given a shelf life of 20 years, whereas those made with chloroprene rubber meeting SAE J20 are given a shelf life of 8 years. The benign nature of this rubber makes components made with Silicone ideal for electronic applications, where long life and chemical inertness are essential to good electrical integrity over the component’s life. Silicone rubber parts can be made extremely conductive (resistivity of 0.0001Ω cm) or highly insulative (resistivity of 1015Ω cm). In the automotive components market Silicone rubber has found major utilities in break line components, electrical grommets, radiator hoses, fuel line check valves (Fluorosilicone) and Oil Pan and Rocker Cover gaskets, as well as Spark Plug boots. It is estimated that in a modern car, 25% of the rubber components (excluding tires) are made of Silicone rubber It is mostly used in Food packaging machinery, Conveyor belting industry, Electronic component manufacturing companies, PCB Panel manufacturing industry, etc.
