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Silicone Foam Products are one of the fastest growing product groups of Stockwell Elastomerics, Inc.. We inventory and fabricate the full product line of Rogers BiscoTM silicone foam materials and Cohrlastic® silicones, including products with low compression set properties, UL94HF-1 and UL94V0 flame ratings, thermal insulation and high temperature stability. We apply a variety of pressure sensitive acrylic and silicone polymer based adhesive backings to all silicone rubber sheet products.
Silicone Foam and Silicone Rubber Sheet is readily fabricated into gaskets and cushioning pads. Fabricating processes include die cutting, adhesive lamination, slitting to width, water jet cutting of prototypes and production components and large fabricated gaskets for telecom base station housings.
Silicone Gaskets and Silicone Tape are available in slit-to-width rolls from silicone foam products ranging from .032" to .375" thick. Gasket strips with unsupported transfer film adhesives allow for the installer to 'make corners' and tight bend radii with a continuous roll of gasketing. Silicone Foam gasketing with film supported adhesives provide dimensional stability, preventing over stretching where gasket installation has to be precise.
 Silicone Foam Gaskets & Pads
Silicone Foam Product Availability Table
Silicone Sponge or Silicone Foam? What is the difference?
Silicone sponge, or closed cell silicone sponge, is derived from a thin sheet of uncured silicone gum, and it expands while curing in a high temperature press or rotocure operation. Closed cell means that the cells are non-interconnecting, therefore not allowing water or air to wick through the sponge at low pressures. Generally, the superior mechanical properties of closed cell silicone sponge provide better weatherproofing. One downside of the gum closed cell silicone sponge products is the inability to achieve flame ratings beyond UL94HB.
Silicone foam is normally considered to be an open cell, lightweight product that is derived from liquid silicone ingredients that are cast onto a liner and cured in an oven. Air and moisture can pass through low density open cell silicone foam unless the design allows for extensive deflection of the gasket. Higher density silicone foams have been developed in recent years that permit good weather sealing with medium and firm density silicone foam products. These higher density silicone foam products are actually composed of many closed cells. One major benefit of the liquid silicone foam chemistry is its flame-retardant properties, with many products meeting the UL94V0 rating.
Why use silicone foam rubber?
Silicone foam rubber has the combined properties of resilience, high temperature stability and general inertness unavailable in any other foam gasketing and cushioning material. These materials are generally unaffected by extended exposure to temperature extremes from -67°F (-55°C) to 392°F (200°C), and are also unaffected by aging and degradation from sunlight and ozone.
UL94VO gaskets are frequently specified for cabinets used in the telecommunications and military electronics hardware. Silicone foam UL94V0 gaskets will provide longer life in outdoor applications than other materials such as closed cell neoprene and related blended gasket materials.
Silicon Foam or Silicone Foam?
We see silicon foam or silicon rubber called out frequently. Although silicon is often called out on prints, silicone is the widely accepted terminology used among the rubber industry.
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