CRG is a recognized leading producer of closed cell silicone sponge gaskets. These gaskets are used in a variety of applications, including sealing, vibration isolation and dampening, cushioning, and environmental. Our silicone sponge gaskets are fabricated from a variety of quality silicone sponge materials, using the most advanced manufacturing techniques.

Closed cell silicone sponge is often referred to as “expanded silicone.” The material is produced when uncured gum silicone is cured at high temperature and allowed to expand to a pre-determined thickness. The term “closed cell” is used because, as the gum silicone cures and expands, it produces a cellular structure within the material where the cells are completely enclosed and non-interconnecting. The resulting sponge is relatively impervious to the transmission of water or moisture through its structure, hence its use in applications where a waterproof seal is desired.

Closed cell silicone sponge is an interesting material. It possesses a high tensile and greater tear resistance, making it a more durable material that silicone foam. Closed cell silicone sponge is a flexible material, meaning it can readily adapt to variety of shapes and contours. It has non-stick properties and has good resistance to ozone and UV light. As noted above, the material presents a good barrier to the ingress of water or moisture when used as a seal.

About Closed Cell Silicone Sponge from CRG

Closed silicone sponges used by CRG to fashion gaskets and other products comes in a variety of thicknesses, density grades and formulations. Density grades available include soft, medium, firm, and extra-firm. Formulations we use offer the following advantages:

CRG Closed Cell Silicone Sponge Gaskets

CRG uses a variety of closed cell silicone sponges to fabricate silicone sponge gaskets and seals. These gaskets and seals are used in a wide array of uses in general industrial, food, pharmaceutical, medical devices, and automotive and mass transit applications. FDA-approved grades are available for food applications. All closed cell silicone sponge gaskets we produce are purpose-made for each customer’s application and all are produced to exacting dimensions and tolerances.

In addition to supplying gaskets, CRG can also produce a variety of other end-use parts from closed cell silicone sponge. Parts and products we can supply include the following:

If you are requiring closed cell silicone sponge gaskets, or other parts fabricated from closed cell silicone sponge, CRG is your preferred supply partner. To find out more about how we can help address your needs, please contact our sales department at


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