Silicone rubber is an elastomer containing silicon together with carbon, hydrogen, and oxygen.
Silicone rubbers are often one or two-part polymers, and may contain fillers to improve properties or reduce cost.
Silicone rubber 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, silicone rubber has a very low tensile strength.
The material is also very sensitive to fatigue from cyclic loading.
Silicone rubber is a highly inert material and does not react with most chemicals.