Stockwell Elastomerics, Inc.

Stockwell Elastomerics manufactures custom silicone gaskets from silicone in its various forms, including solid silicone, expanded silicone sponge and silicone foam. Stockwell Elastomerics also injection molds platinum cured liquid silicone parts and gaskets, and compression molds specialty gaskets from electrically conductive silicone and chemical resistant fluorosilicone.

Custom dust gaskets are frequently manufactured by Stockwell Elastomerics to customer specification. Sealing out dust and other small foreign object debris (FOD) is a common gasket applications for Stockwell Elastomerics' customers. Dust sealing is usually less rigorous than water sealing, allowing for a wider range of materials. But proper material selection is still critical for proper gasket performance. Common specifications for dust sealing are NEMA Type 1, IP5X and IP6X (IP50 and IP60 have no water sealing requirements).

Solid silicone gasket products are manufactured by die cutting or waterjet cutting parts from continuous roll sheet materials or molded sheets. Solid silicone rubber offers a wide hardness range, from 10 - 70 durometer on the Shore A scale. The low durometer silicone 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. Stockwell Elastomerics injection molds and compression molds solid silicone seals with custom cross-sections for improved sealing integrity for water submersion requirements.

Molded silicone seals with round or custom cross-sections are often required for heavy wash down (IP66 or NEMA 4) or water submersion requirements. Liquid silicone rubber (LSR) enables very small cross sections, down to .030", to be molded in durometers from 10 to 70 Shore A. With injection molded liquid silicone rubber, parting line flash can be reduced to ensure sealing integrity. Request our helpful Liquid Silicone Touch brochure to assist in designing enclosure seals.

Most elastomeric polymers used to make gaskets are hydrophobic in the macro sense, meaning they do not absorb water. On a finer scale, the surface texture, surface residue, and cell structure factor into the "beading" effect commonly associated with hydrophobic materials.

Stockwell Elastomerics manufactures custom soft gaskets from various soft gasket materials to customer specification. "Soft gasket" is a relative term; for heavy industrial applications a 40 durometer rubber may be considered a soft gasket material, but in an electronics application, a 40 durometer rubber would be considered hard.