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Sponge Profiles / Gaskets by Silex

Development and customer specified production of tubes and profiles made of HCR Silicone-rubber

Sponge Profiles / Gaskets
For special applications it is possible to produce cellular profiles which combine the typical properties of sponge articles with the individual properties of silicone type products.

Silex produces silicone-rubber sponge/foam profiles according to customer specifications for the industrial- as well as for the food markets (raw material conformity according to FDA).

Because of a high variety of different processes of blowing, the final products are very customized to your application depending on tensile strength, compression set und the type of cells (open / closed).

Furthermore Silex produce also profiles / gaskets made of 2 different rubbers, so-called "co-extruded profiles". This technology allows us to combine solid and sponge rubber in one profile / gasket.

Linked to the process the hoses always have a closed skin.

Dimensions / Specific gravity

Wall Thickness Width Height Specific gravity
2 - 20 mm 100 mm 50 mm 0,3 - 0,8 g/cm³

Typical properties

Shore A 8 - 13 12 - 18 18 - 22 22 - 28
Specific gravity, g/cm³ approx. 0,4 0,5 0,6 0,7
Thermal conductivity, W x m-1 K-1 0,07 0,1

(The average thermal conductivity regarding non-cellular rubber is approx 0,2 - 0,3 W x m-1 K-1)

The standard set up of the articles are rolled rings or customer specified.

Type of profiles / properties

  • Profiles equipped with a self adhesive tape.
  • Production of O-rings by bonding or vulcanising.
  • Using of filaments in order to minimise elongation stress.
  • Reducing of coefficient of friction in order to become a smooth surface.
  • Open cells up to most closed cells.
  • Natural white colour or special colours according to the RAL-system.
  • Food contact applications (BFR XV, FDA CFR 21 § 177.2600).
  • Very high thermal- and sound-isolation level.
  • High sealing behaviour because of easy compression and high elasticity (compensation of tolerances).
  • Typical silicone properties are very high hot-air resistance, weathering- and ageing resistance (UV, ozone) as well as very low variation of properties over a range of temperatures.

Pictures of our Sponge Profiles / Gaskets

When your desired requirements are not listed in the above, please contact us. The diversity of silicone products is too big to list them all on this page.

Phone: 02323 98644-0
Fax: 02323 98644-56
E-Mail: verkauf@silex-silikon.de