Silicone Gaskets- Solid, Foam, Sponge

At NEDC, we offer an incredibly wide range of materials. High performing materials such as silicone rubber is one of them. The reason for this is because silicone has countless incredible properties. These include great electrical properties, high & low temperature tolerance, great customizability, and also has an incredible amount of specifications allowed to purchase the material to. Silicone gaskets are manufactured out of silicone foam, silicone sponge, and silicone solid rubber.

silicone foam, silicone sponge, silicone solid
foam, sponge, solid silicone

Silicone Rubber Foam

As we discussed in other blogs, silicone foam is manufactured out of liquid silicone that is cast onto a liner, and heat cured. Silicone foam is used in demanding sealing applications that require low compression set along with tough environmental properties. Some common silicone foam products include Rogers: BISCO HT-800, HT-820, HT-840, HT-870 and more. The benefits of silicone foam include a large variety of densities, that can be helpful when choosing a gasketing material that will work with the compression available in the application. This material is available in a tape format(adhesive backing). NEDC die-cuts/waterjet cuts silicone gaskets out of silicone foam into many unique shapes.

Silicone Rubber Sponge

Silicone Sponge is similar to silicone foam, except the silicone sponge is made out of a solid compound that cures differently. This compound is similar to a clay like consistency before curing. Similar to many silicone materials, silicone sponge is made to specifications to ensure consistent product. Specifications for silicone sponge include: AMS-3195, AMS-3196, ASTM D1056, MIL-R-46089, ASTM D6576, and MIL-R-6130. Silicone sponge materials are available in different softness ranges, allowing for different application fits. Depending on the specification silicone sponge can come anywhere from super-soft to firm. These firmnesses define how hard the material is to deflect during compression. This material is available in a tape format(adhesive backing).

Silicone Rubber Solid

Silicone Solid usually refers to rubber that is not cellular in nature. These silicone gaskets range from incredibly very soft, such as 10A durometer to very hard, such as 90A durometer. Some specifications for silicone rubber include A-A-59588, ZZR765, ASTM D2000 GE, AMS-3301(40A durometer), AMS-3302(50A durometer), AMS-3303(60A durometer), and AMS-3304(70A durometer). This material is available in a tape format(adhesive backing).

NEDC applies acrylic PSA to silicone products to allow for easy application in manufacturing for its customers. In addition, NEDC die-cuts, waterjet-cuts, and laser-cuts into custom shapes. Oftentimes these custom shapes are silicone gaskets. For more information on silicone products, or you believe you have an application that could utilize a silicone product, please contact

Share this article: