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# PD 25

Silicone Rubber Sheet

Silicone Rubber Sheet maintains its resistance to a wide range of temperature variations, from -101 C to 260 C or -150 F to 500 F. It also displays good resistance to UV, ozone gases, moisture and has a natural translucent color, so its flow could be easily observed visually. It is highly resilient, resistant to compression, odorless, stretchable and is inert and tasteless also. Silicone maintains its resistance to corona concentration and ozone over an extended period of time. It typically self-extinguishes itself within 3 to 8 seconds, which is one of its good electrical properties that make it a preferred choice for computer applications and other appliances. Since it does not contain sulphur or any acid producing chemicals, it does not cause corrosion, staining or any other deteriorating effects on the materials coming in its contact. Lined hose camps and standard barbed fittings should be used for most applications.




The Rubber Sheet is specially manufactured for use in the applications requiring High Temperatures.

Silicone Rubber is an elastomer (rubber like substance) whose main component is silicone polymer and it also contains hydrogen, carbon and oxygen. Silicon rubber formulations may have one or two part polymers and may contain fillers to improve properties or reduce costs. It is widely used in the industry and is usually stable, non-reactive and resistant to a wide range of temperature, varying from -55 °C to +300 °C. Since it maintains its properties even in high temperatures and could be easily manufactured and given desired shape, silicone rubber is widely used in a variety of applications including automotives, food storage products, baking, apparels, cooking, sportswear, electronics, undergarments, footwear, home repair, medical devices & implants, and in hardware like silicone sealants.

During its manufacturing, heat may be required to vulcanize (set or cure) it into its rubber like form. Vulcanization is done during manufacturing, which is a two stage process through which silicone rubber is given its desired shape and then a prolonged post cure process is done. The rubber can also be injection molded if required.

Silicone rubber is resistant to a high range of temperature variations, ranging from 55 °C to +300 °C and maintains it properties within this wide temperature range. Under extreme temperature conditions, silicone rubber still displays far better tensile strength, tear strength, compression set and elongation than conventional rubber though it may be relatively low as compared to other materials. Organic rubber has a carbon to carbon backbone which makes it susceptible to UV rays, ozone radiation, heat and other aging factors, while the silicone rubber can withstand them to a good degree. All these properties of silicone rubber make it a favorite elastomer for extreme environments.

However, silicone rubber has a very low tensile strength in comparison to organic rubber. Therefore, care should be taken to design products to withstand low imposed loads. Silicone rubber is sensitive to fatigue resulting from cyclic loading. It is a highly inert material and does not react with a large number of chemicals. Due to this property, it is used in medical implants and various other medical applications.


Once being mixed and colored, silicone rubber can be easily extruded into tubes, solid cord and strips, or even custom profiled as per the size specifications of the manufacturer. The cords can be easily joined to make O-rings while the extruded profiles can be easily joined to make seals. Silicone rubber can also be moulded into desired shapes and given custom designs. Manufacturers need to set industry tolerance when extruding, joining or cutting silicone rubber profiles. In the UK, silicone rubber is produced as per BS3734 rating. For extrusions of silicone rubber, tightest level is E1 while the widest is E3.

Silicone rubber is widely used by the consumers and could be seen in a variety of items that are found in a typical home. It is widely used in automotive applications, electronics, hardware, food storage products, baking, cooking, sportswear, undergarments, apparels and a host of other applications.

Freeze tolerant solar water heating panels exploit the elasticity of silicone, allowing it to repeatedly accommodate for the expansion of water on freezing. Extreme temperature tolerance of silicone rubber makes it less tolerant to brittleness while it shows excellent tolerance to temperatures above 150 °C. It does not have a carbon backbone but a chemically robust silicone backbone. It’s a good hygienic property which reduces its potential as a food source for dangerous waterborne bacteria like Legionella.

Non-dyed silicone rubber tape with an iron-oxide additive provides it a red orange color. This variant of silicone rubber has non-flammable nature and is widely used in aerospace and aviation related wiring applications as a wrapping or splice. Addition of iron-oxide enhances thermal conductivity of silicone rubber but does not affect its high electrical insulation properties. This type of tape self-fuses or amalgamates and does not require any adhesives for the purpose.

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