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Western Rubber & Supply, Inc. Since 1976

Silicone Sponge

Western Rubber & Supply, Inc. WesLastomer™ Silicone Sponge.

WesLastomer™ silicone sponge rubber materials are excellent materials for gasketing and padding applications that require a soft, compressible material. The closed and partially-open cells of these sponges prevent water absorption. These materials also provide the ozone, weather and UV resistance typical of silicone. Closed-cell silicones are available in Soft, Medium, Firm and Extra-firm densities. Contact customer service for other color variations of these materials or for help selecting the right silicone sponge for your applications.

Grade 4300 Soft Density Closed Cell Silicone Sponge is available in continuous rolls up to 1/2″ thick and sheets up to 1″ thick.

Grade 4400 Medium Density Closed Cell Silicone Sponge is the most popular density of silicone sponge material. It is available in continuous rolls up to 1/2″ thick and sheets up to 1″ thick.

Grade 4500 Firm Density Closed Cell Silicone Sponge is available in continuous rolls up to 1/2″ thick and sheets up to 1″ thick.

Grade 4600 Extra Firm Closed Cell Sponge is available in continuous rolls up to 1/2″ thick and sheets up to 1″ thick.

Grade 4700 “OpenCell” Silicone Foam is designed to be used in applications where a lightweight, easy-to-compress material is desired. It is available in thicknesses of 1/16″ through 1″.

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