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What Is Silicone Rubber?
Silicone rubber is a specialty synthetic elastomer that provides a unique balance of chemical and mechanical properties required by today’s most demanding applications.
Silicone rubber excels in such areas as high temperature stability, low temperature flexibility, chemical resistance, weatherability, electrical performance and sealing capability. Because of its relative purity and chemical composition, silicone rubber displays exceptional biocompatibility, making it an attractive choice for many health care and pharmaceutical applications.
Compared to many organic elastomers, silicone rubber offers superior ease of fabrication resulting in high productivity, cost effectiveness, and extended service reliability. Silicone elastomers have assumed prominent roles in the automotive, aerospace, electrical/electronic, health care, semiconductor, construction, business machine, and graphic arts industries.
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Types Of Silicone Elastomers
HCE (heat cured elastomers), LIM (liquid injection molding elstomers) and RTV (room temperature vulcanization) materials are differentiated primarily by their viscosity and curing mechanism and span the gamut from flowable adhesives to block-like, high consistency rubber compounds designed to release from hot mold surfaces. This diversity in form and process provides the utmost in versatility for satisfying a wide range of application needs. This section addresses heat-cured elastomers (HCE / HCR), which require conventional rubber fabrication and heat activated vulcanization.
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Attributes and Terminology
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HCE/HCR Type
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Physical Form
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Non-pumpable,
rubber compound
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Fabrication Process
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Molding, extrusion, calendaring
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Viscosity Range, cps
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5,000,000 - 20,000,000
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Catalyst Type
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Peroxide or platinum
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Common Names
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Heat Cured Elastomer (HCE)
Heat Cured Rubber (HCR)
Millable Gum
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