Silicone Gaskets

Sponge Silicone Gaskets
Sponge silicone gaskets are soft in comparison to solid silicone gaskets, though there is some cross-over at the low durometer solids and the firm grades of silicone sponge. The structure make silicone sponge an excellent product for environmental seals such as NEMA 4 and IP-65. Silicone by nature performs well under UV and is mechanically stable over a broad temperature range, often considered for high temperature gaskets and low temperature gaskets. The firmness of silicone sponges is commonly defined by compression force deflection in a psi (pounds per square inch) range compressed 25%. 2 to 5 psi compression force deflection is considered soft, whereas 14 to 20 psi is considered firm.

Solid Silicone Gaskets
Solid silicone gaskets are generally die cut or waterjet cut from sheet goods. The hardness of solid silicone gaskets are called out in durometer on the Shore A scale ranging from 10 - 70 durometer. Solid gaskets are very firm in comparison to or gaskets. Solid gaskets in the mid to higher durometers require good closure force and are more commonly used on metal closures (as compared to plastic). Stockwell can also injection mold or compression mold solid silicone gaskets. Molded seals with round cross-sections are often required for improved sealing integrity for water submersion requirements.

Stockwell Elastomerics manufactures custom silicone gaskets, including solid silicone gaskets, silicone sponge gaskets, silicone foam gaskets, and injection molded silicone gaskets for many industries and applications.