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Silicone profiles: properties, special features and much more

H. Schubbe

Silicone profiles have become an indispensable part of our everyday lives. They seal windows and doors, protect electronic devices and are even used in the food industry. But what exactly are silicone profiles, what properties make them so versatile, and where are they used? This article gives you a comprehensive overview.


Silicone profiles in different shapes and colors
Verschiedene Silikonprofile

What are silicone profiles?

Silicone profiles are extruded seals made of silicone rubber that can be manufactured in a wide variety of shapes and sizes. They are characterized by their high flexibility, temperature resistance and chemical resistance.


Silicone is a synthetic polymer composed of silicon, oxygen and other elements. It is a very versatile material that can be used in a wide range of applications. Silicone rubber is a type of silicone that is particularly elastic and durable.


Silicone profiles are manufactured by extrusion. In this process, the silicone rubber is pressed through a nozzle to obtain the desired shape. The profiles can then be cut to the desired length and further processed.


Properties of silicone profiles

Silicone profiles have a number of properties that make them ideal for a wide range of applications:


Thermal properties:

  • Heat resistance: Silicone profiles can withstand temperatures of up to 250 °C without losing their properties.

  • Cold resistance: Even at low temperatures, silicone profiles remain flexible and elastic.

  • Thermal insulation: Silicone profiles have low thermal conductivity and can therefore be used for thermal insulation.


Mechanical properties:

  • Flexibility: Silicone profiles are very flexible and can also be bent into tight radii.

  • Elasticity: Silicone profiles return to their original shape after deformation.

  • Tensile strength: Silicone profiles are very tensile and tear-resistant.

  • Abrasion resistance: Silicone profiles are resistant to abrasion and wear.


Acoustic properties:

  • Sound insulation: Silicone profiles can be used for sound insulation.

  • Vibration dampening: Silicone profiles can absorb and dampen vibrations.

Chemical properties:

  • Chemical resistance: Silicone profiles are resistant to many chemicals, oils and solvents.

  • UV resistance: Silicone profiles are resistant to UV radiation and do not yellow.

  • Ozone resistance: Silicone profiles are resistant to ozone and other aggressive gases.


Additional features:

  • Food safety: Some silicone profiles are food safe and can be used in the food industry.

  • Medical compatibility: Some silicone profiles are medically compatible and can be used in medical applications.

  • Water resistance: Silicone profiles are water-resistant and can be used in humid environments.

  • Variety of colors: Silicone profiles are available in a wide range of colors.


Application areas of silicone profiles

Silicone profiles are used in a variety of industries, including:

  • Construction: sealing of windows and doors, facade cladding, expansion joints

  • Automotive: Seals for engines, transmissions and bodies, cable ducts

  • Electrical engineering: insulation of cables and wires, protection of electronic components

  • Mechanical engineering: seals for machines and systems, protection against vibrations and noise

  • Food industry: seals for food packaging, hoses and pipes

  • Medical technology: catheters, tubes, implants

  • Sanitary sector: seals for showers and bathtubs, fittings

  • Household appliances: seals for refrigerators, washing machines and dishwashers


Examples of concrete applications:

  • Window and door seals: Silicone profiles are often used as seals for windows and doors. They ensure optimal sealing and prevent drafts, noise and heat loss.

  • Seals in the sanitary area: Silicone profiles are also used in the sanitary area to seal showers, bathtubs and fittings.

  • Seals in the food industry: In the food industry, silicone profiles are used to seal food packaging and ensure hygiene.

  • Seals in mechanical engineering: In mechanical engineering, silicone profiles are used to seal machines and systems and to protect them from vibrations and noise.


Silicone profiles from Rexio

Rexio GmbH & Co. KG is a leading supplier of silicone profiles. We offer a large selection of profiles in different shapes, sizes and colors as well as durability and material. Our silicone profiles are characterized by their high quality and durability.



We would be happy to advise you on the selection of the right silicone profiles for your application. Simply contact us via our contact form, live chat or give us a call.


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