Silicone Rubber is an elastomer containing silicon together with carbon, hydrogen, and oxygen.
They are often one or two-part polymers, and may contain fillers to improve properties or reduce cost.
It is generally non-reactive, stable, and resistant to extreme environments and temperatures while still maintaining its useful properties. Due to these properties and its ease of manufacturing and shaping, silicone rubber can be found in a wide variety of products, including: automotive applications; food and medical industries.
At the extreme temperatures, the tensile strength, elongation, tear strength and compression set can be far superior to conventional rubbers.
Organic rubber has a carbon to carbon backbone which can leave them susceptible to ozone, UV, heat and other ageing factors that silicone rubber can withstand well. However compared to organic rubbers, this has a very low tensile strength.
The material is also very sensitive to fatigue from cyclic loading.
It is a highly inert material and does not react with most chemicals.