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Silicone Sponge
High-performance, high-quality foam conversion for demanding environments
At Kewell Converters, our silicone sponge foam products are a core part of our specialist offering. Known for its outstanding thermal stability, weather resistance, and sealing capabilities, silicone sponge is ideal for critical environments where safety, performance, and durability are non-negotiable. From aerospace seals to military-grade gaskets and vibration-dampening components, we develop bespoke foam solutions tailored to meet the most stringent specifications and regulatory standards.
Why choose silicone sponge foam?
Silicone sponge is a closed-cell, elastomeric foam material produced through heat curing, which expands its structure to create a soft, porous, and incredibly resilient product. Here’s why it’s trusted across military, aerospace, and high-tech industrial sectors:
- Wide temperature resistance
Performs consistently from -73°C to +200°C, making it suitable for extreme hot and cold environments, including aerospace applications, engine compartments, and military electronics - Water & weather sealing
Its closed-cell structure ensures excellent resistance to moisture, liquids, and outdoor elements—ideal for gaskets and seals that need to remain effective over time - UV, ozone & chemical resistance
Silicone’s unique structure resists degradation from UV light, ozone, and harsh chemicals—crucial for exposed or outdoor components - Compression set resistance
Maintains shape and functionality under repeated stress and high temperatures—making it ideal for vibration dampening, cushioning, and thermal insulation
Applications of silicone sponge at Kewell Converters
We specialise in designing and manufacturing custom foam parts that are made from high-quality, branded foams—which includes our silicone sponge foam. Our in-house team of foam engineers and designers work collaboratively with clients to develop bespoke parts, components, and assemblies for a variety of applications.
Gaskets and seals
Engineered for leak-proof performance in aerospace fuselages, control panels, engine compartments, and industrial ovens
Thermal and electrical insulation
For high-temperature systems in aerospace, renewable energy, and manufacturing environments where safety and efficiency matter most
Cushioning and vibration dampening
Used in military-grade electronics, protective housings, and critical systems requiring shock-absorbing capabilities
Protective foam inserts and custom enclosures
For transport cases, flight packs, drone systems, and mission-critical components requiring precision-cut, protective foam
Expert foam fabrication with full project support
Unlike typical foam resellers, Kewell Converters provides complete foam conversion and foam fabrication services. We don’t just cut sheets—we solve problems.
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- Full CAD design process
Every project includes comprehensive CAD support. We optimise your design for manufacturability, material performance, and cost-efficiency—ensuring your final product performs as required. - Complex engineering, made simple
We manage the entire supply chain—from sourcing specialty foams like silicone sponge to managing sub-components—so you don’t have to. This reduces your supplier base and makes procurement more efficient. - Quality, precision and performance
Our experienced team understands the tolerances and properties of every foam we work with. Whether it’s a foam strip, seal, insert, or complex foam part, our goal is always the same: to deliver durable, high-quality foam parts that perform reliably under pressure.
- Full CAD design process
Looking for custom-cut silicone sponge foam parts?
Get in touch today for a tailored quote or to speak directly with our engineering team.
Why work with Kewell Converters?
- 50+ years of foam expertise
- Dedicated engineering & CAD team
- Precision foam conversion & fabrication
- Specialists in silicone sponge & other specialty foams
- Experience in military, defence, aerospace & industrial projects
Thank you once again for going the extra mile for us on getting our order into us as promised, this is very much appreciated.”
Ready to specify silicone sponge foam for your next project?
Let’s talk. Our foam specialists are here to guide you through material selection, design optimisation, and production—from prototype to full production run.
FAQs
It withstands temperatures from -73°C to +200°C and resists UV, ozone, moisture, and chemicals—making it ideal for aerospace, military, and industrial applications.
Yes, its closed-cell structure offers excellent water and weather sealing, ideal for outdoor and exposed environments.
Absolutely. We offer full CAD support and precision fabrication for custom gaskets, seals, inserts, and enclosures.
Yes, it has excellent compression set resistance, meaning it retains performance even under repeated pressure or heat.
Our foam is trusted in aerospace, defence, renewable energy, high-tech manufacturing, and transport.
