Silicone Rubber Gaskets

Silicone is the general name for a family of polymers that includes any synthetic compound consisting of repeating units of siloxane (from which the material’s alternate name, polysiloxane, derives). Siloxane is best described as a chain of alternating silicon and oxygen atoms; carbon and/or hydrogen are frequent additives.

Silicone Rubber Gaskets are High-Performance Mechanical Seals With a High Resistance to Extreme Temperature.

There is little or no effect on the silicone rubber material at temperatures between -60°F to +400°F. It also has exceptional UV and ozone properties which makes them suitable for outdoor applications. Being an inert material, silicone generally does not react to the majority of chemicals and other fluids like acetic acids, detergents, alcohol and salt water making it popular for use in medical and industrial applications. Silicone is a very clean rubber with low odor and taste and it is generally non-reactive and stable.

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Silicone Gaskets are Used to Prevent Leaks Between Different Substrate Sections in a Wide Range of Applications Including for High Temperature, Food Grade (FDA), High Strength, High Purity, Fire Retardant and Thermally Conductive EMI/RFI Applications.

  • High strength, high temp - Good shock absorbing qualities and long life.

  • High purity, high temp - USP Class V1.

  • EMI/RFI shielding high temp - Conducts electricity to protect equipment from damaging static charges.

  • Thermally conductive, high temp - Electronics applications, transfer heat well.

  • Fire-retardant, high temp - Barrier against fire and smoke to FAR 25.856 and UL94VO.

  • Fabric reinforced, high temp - Fiberglass cloth is inserted for strength against high stress and flexing.

  • Criss-cross surface - Better gripping.

Alpha Die Cutting Located in San Diego, Can Source Silicone Rubber Material with a Plain Backing or with a PSA (Pressure Sensitive Adhesive) on 1 Side and in a Range of Hardness.

The low durometer silicone rubber gaskets (10A, 20A, 30A) offer excellent environmental sealing with relatively low closure force. Solid gaskets in the mid to higher durometer range require higher closure forces; these are commonly used on metal enclosures or rigid enclosures with a suitable bolt pattern to properly compress a firm gasket.

Alpha Die Cutting’s Solid Silicone Gasket Products are Manufactured by Die Cutting Flat Parts from Continuous Rolls or Sheets of Silicone Rubber.

So that we provide the customer with the best combination of price, quality and delivery, we source from 3 different silicone rubber suppliers. We source high temperature silicone rubber material to make gaskets that are food grade (FDA), to MIL spec and AMS standards. We manufacture flat standard gasket and washer sizes, as well as custom sizes. Alpha Die Cutting Manufacture Gaskets From ¼” to 28” in Diameter. Silicone rubber material is available in various thicknesses from 0.005” to 0.50”.

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Alpha Die Cutting Industrial Gaskets are Manufactured by Us at Our San Diego Location, in Many Different Types Including Flange Gaskets, Silicone Rubber Seals, Silicone Rubber Washers, Custom Silicone Rings, Silicone O Ring Gaskets and Large O Rings.  

Silicone rubber is primarily available in red color but it is also available in other colors including white, cream, black, yellow, green, blue, brown and clear. Material is also available in silicone sponge or silicone foam.

We provide a friendly, caring and helpful interaction to ease all concerns you have – this is the best in class service you can always expect from the Alpha Die Cutting. Call (858) 279-3343 or email