Silicone rubber is physiologically inert, thus making it the preferred choice of medical, phramaceutical and food processing industries. Silicone have comparatively low mechanical properties, tensile strength elongation and tear strength, however they keep constant even at high temperature but should not be used with high-pressure steam. Its resistance to oiland hydrocarbon products is fairly limited and similar to that of Choloprene rubbers. Reasonable resistance to a whole range of general chemical products, but acids, alkalis, esters and kerosene should be avoided. Silicone has excellent resistance to heat (dry air), at +200° C intermittent. It remains flexible at low temperatures of -70° C and it is also resistant to ultra-violet light, Ozone and weathering. Exhibits low inflammability and low smoke toxicity. It has good electrical insulation properties.