What is kSil®FR100?
kSil®FR100 is the latest innovation in Silicone Engineering’s kSil® range; it’s a flame-retardant, lightweight silicone sponge that provides excellent thermal insulation, fire safety and long-term environmental resistance.
Manufactured to the highest standards, this versatile material has been engineered for use in critical sealing, insulation and protection applications, where both performance and reliability are non-negotiable.
Available in sheet or roll form (up to 1m width) and supplied in standard white with optional pressure-sensitive adhesive backing, kSil®FR100 is suitable for die-cut gaskets, flexible seals and insulation components across multiple industries.
Key features and performance benefits
- Wide operating temperature range, from –60°C to +230°C (–76°F to +446°F)
- Flame retardant to UL94 V-0 and FAR 25/JAR 25 standards
- Excellent ozone, UV and weather resistance
- Ultra-low density for weight-sensitive applications
- Low thermal conductivity (0.055 W/m·K) for effective insulation
- Outstanding compression set performance for long-term sealing integrity
- Long service life even under continuous heat exposure
These features make kSil®FR100 an ideal choice wherever performance under pressure (and protection against fire or extreme heat) is required.
Thermal and flame performance in extreme environments
kSil®FR100 has been developed for environments where temperature extremes and fire safety are critical. Its wide temperature range means it remains flexible and functional from –60°C up to +230°C, while its flame-retardant performance ensures compliance with UL94 V-0 (vertical burn test) and FAR 25/JAR 25 (aerospace flammability standards).
This combination makes it perfectly suited for use in aerospace and transport systems, battery enclosures and thermal barriers, where both lightweight design and safety certification are paramount.
Environmental resistance and long-term reliability
Beyond its flame resistance, kSil®FR100 has been engineered for durability in harsh environments. The closed-cell structure provides inherent resistance to ozone, UV and weathering, making it ideal for outdoor applications and long-term installations.
Even after prolonged exposure to heat, compression or environmental stress, kSil®FR100 maintains its physical integrity, delivering reliable performance and reduced maintenance over its service life.
Typical applications across industries
The combination of flame retardancy, thermal insulation and environmental resilience makes kSil®FR100 suitable for a wide range of demanding applications, including:
- Aerospace
Lightweight thermal insulation, vibration-damping seals and fire-safe gaskets. - Transport & automotive
Interior sealing, battery insulation and fire barrier components. - Energy & power systems
Thermal management in battery modules, control cabinets and switchgear. - Electronics & enclosures
Heat shielding, cushioning and EMI-safe sealing solutions. - Industrial equipment
Flexible insulation pads, gasketing and anti-vibration mounts.
kSil®FR100 delivers proven performance wherever long-lasting protection against heat, fire and the elements is required.
Why choose Silicone Engineering for advanced silicone materials?
For more than six decades, we’ve been a trusted leader in silicone material innovation, supplying high-performance silicone sponge and solid sheet solutions to global industries.
Our in-house R&D, material science expertise and precision manufacturing allow us to develop and deliver engineered silicone solutions that meet the toughest safety, thermal and environmental requirements.
With the launch of kSil®FR100, we’re continuing our commitment to innovation – offering a next-generation silicone sponge that sets new benchmarks in lightweight performance and flame safety.
Speak to our team about kSil®FR100
Ready to find out how kSil®FR100 can enhance your next project? Our technical team is here to help you specify the right material for your application. Contact us today to discuss your requirements.
Want to learn more about the FR100? Fill out the form below to download the flyer.
