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The term closed cell means that the foam has a cellular structure within the material where the cells are completely enclosed and non-interconnecting. The foam is therefore impervious to the transmission of water or moisture. Closed-cell silicone foams are currently available in lots of colors.
We manufacture and supply closed-cell sponge. It has a much different cell structure from an open cell, but each cell in a closed-cell sponge is a complete closed sphere, trapping air within each cell. Unlike open-cell, water, moisture, and dust cannot readily enter the cell structure due to the lack of connectivity between the cells. Closed-cell sponge is great for sealing when water and dust need to be kept out of an application, as it has very low water absorption.
Closed-cell silicone foam is manufactured from a low-viscosity liquid silicone that is cast on a smooth liner and cured through inline ovens. Silicone foam is a flexible, light-density material with a smooth skin or regular surface texture on both sides.
What is silicone sponge sheeting used for?
Silicone sponge sheeting is used for a variety of purposes, including sealing, cushioning, vibration dampening, and thermal insulation. Some specific applications of silicone sponge sheeting include:
Gaskets and seals: Silicone sponge sheets are used to create airtight and watertight seals in various industries, such as automotive, aerospace, and electronics. They provide excellent resistance to weathering, UV radiation, and extreme temperatures. See our Custom Cut Gaskets & Seals page.
Cushioning and shock absorption: Silicone sponge sheets are used as padding or cushioning material in packaging, electronics, and medical devices. They can absorb shocks and vibrations, protecting delicate components or products during transport or use.
Thermal insulation: Due to their low thermal conductivity, silicone sponge sheets are used to insulate and protect components that are exposed to high temperatures, such as in industrial ovens, furnace seals, or engine gaskets.
Sound dampening: Silicone sponge sheets can be used as soundproofing material in various applications, including architectural settings, automotive industry, or HVAC systems. They can reduce noise transmission and improve acoustic isolation.
Electrical insulation: Silicone sponge sheets are used as electrical insulators due to their excellent dielectric properties. They can be used to cover electrical wires or components, providing protection against electrical shocks or short-circuits.
Overall, silicone sponge sheeting is a versatile material with numerous applications where properties like flexibility, high-temperature resistance, and sealing capabilities are required.
Benefits of Closed Cell Silicone Foam
Wide temperature resistance: Able to withstand temperatures greater than 446°F and as low as -76° It is therefore an excellent option for applications with either extreme cold or heat.
Flame resistant: Silicone foam can withstand 2100°F flame for more than 10 minutes without burning through in thicknesses down to 3/8”. It is also self-extinguishing.
Low compression set: Capable of resisting compression set and deformation under compressive load. This property makes silicone foam a great choice for sealing applications.
Food safe: As a non-reactive polymer, closed cell silicone foam exerts little to no effect on food or beverages. Many closed cell silicone foams are FDA-approved for use in food-grade applications.
Ozone and UV resistant: Making closed cell silicone foam an excellent material for outdoor applications.
Water and moisture resistance: Closed cellular structure results in good sealing against water, moisture and weather.
AHD shock absorption silicone foam sheet and Heat insulation silicone foam sheet
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