Silicone Rubber Gaskets

Silicone rubber gaskets are mechanical seals capable of operating in extreme environments. Silicone rubber gaskets form leak-tight seals between two parts of components used in a diverse range of applications.

As well as supplying a range of standardised gasket and washer sizes, Viking Extrusions are able to supply bespoke gaskets cut to design to meet specific requirements. Silicone Gaskets can be produced to fulfil one-off or high-volume requirements.

Silicone Gasket Design

Silicone gaskets can be produced up to 3000mm x 1500mm x 20mm thick (50mm maximum thickness for silicone sponge).

We are able to accept CAD files in a variety of formats including .dwg, .dxf, .step and .iges.

Silicone Gasket Applications

Silicone Rubber is a synthetic elastomer with outstanding thermal stability, maintaining its flexibility and compression set at both high and low temperatures. Silicone rubber also has excellent non-stick and electrical insulation properties making it suitable for a wide range of gasket applications.

Silicone rubber gaskets are also frequently used in outdoor environments due to the material’s excellent resistance to weathering, ozone, UV, and oxidation. Silicone rubber is an inert material, and does not react with many chemicals, making it highly suitable for medical and industrial applications.

Viking Extrusions also supply flame retardant gaskets made from silicone rubber compounds formulated to meet rail specifications EN45545-2 and aerospace FAR/JAR 25.853 requirements. Our gasket materials include:

  • FDA approved silicone rubber gaskets
  • WRAS approved silicone gaskets
  • Conductive silicone gaskets
  • Platinum cured silicone rubber gaskets
  • Metal detectable silicone rubber gaskets
  • High temperature silicone rubber gaskets
  • Medical grade silicone gaskets
  • Flame retardant silicone gaskets

For more information regarding our material options visit our materials page.

How are silicone rubber gaskets manufactured?

Die cutting involves creating a bladed tool in the shape of the desired gasket. The tool is set either above or below the gasket material. A hydraulic press is then used to cut out the gasket. Die cutting has several advantages including:

  • Low tooling cost
  • Fast set up time
  • Reusable tooling
  • Consistent cutting tolerance
  • Suitable for small and large production runs

Flash cutting can be used to quickly create custom gaskets. During the flash cutting process, a dieless oscillating knife is used to cut through material of varying depth. Cutting equipment is integrated with computer aided design (CAD) systems. The CNC cutting machine uses code generated from the CAD file to control the movement of the knife, to accurately produce the desired shape.

Advantages of CNC flash cut gaskets include:

  • No tooling costs
  • Fast lead times
  • Multiple designs can be cut on a single sheet
  • Highly complex shapes & designs
  • Consistency across gaskets
  • Human error removed

Lathe cutting involves placing a silicone rubber tube onto a mandrel. The mandrel is then rotated at high speed on a lathe machine

  • Fast lead times
  • Tight tolerances
  • Minimal material waste
  • Suitable for large OD & Small ID gaskets

Custom Gasket Cutting

We are able to supply bespoke gaskets cut to design to meet specific requirements. Rubber gaskets can be produced to fulfill one-off or high-volume requirements.

Get in touch with Viking Extrusions

Contact our expert team of silicone engineers for advice, quotations or any other queries.