Product Overview
kSil® V-0 Medium-Firm Flame-Resistant Silicone Sponge — Technical Overview & FAQs
Product Overview
kSil® V-0 Medium-Firm Flame-Resistant Silicone Sponge is a closed-cell silicone sponge engineered for UL 94 V-0 flame performance, increased structural support, and high-reliability environmental sealing.
The Medium-Firm grade offers enhanced rigidity and compression resistance compared to lower-density grades (Soft, Soft-Medium, and Medium), making it ideal for applications requiring stronger sealing pressure, dimensional stability, and higher mechanical durability.
This material provides exceptional resistance to heat, UV, ozone, humidity, and environmental exposure while maintaining low water absorption and excellent compression set resistance.
kSil® V-0 Medium-Firm is widely used in transportation equipment, industrial enclosures, electrical housings, EV battery insulation, and fire-rated mechanical assemblies.
Applications
High-pressure UL 94 V-0 environmental seals
Industrial enclosures and control panel gasketing
EV battery pack insulation and compartment seals
LED lighting fixtures and equipment housings
Transportation and heavy-equipment fire-rated gaskets
High-compression flame-resistant pads and barrier seals
Key Properties
Material Type: Closed-cell silicone sponge (Medium-Firm density)
Flame Rating: UL 94 V-0 (self-extinguishing performance)
Compression Force: Medium-high — ideal for stronger sealing and support
Density: Higher-density formulation than Soft, Soft-Medium, or Medium grades
Compression Set: Excellent long-term recovery under elevated pressure
Temperature Range: –67 °F to +446 °F (–55 °C to +230 °C)
Water Absorption: Minimal (closed-cell construction)
Environmental Resistance: Outstanding UV, ozone, and weather durability
Chemical Resistance: Resistant to oils, solvents, and environmental aging
Available Formats: Sheets, rolls, strips, die-cut gaskets, PSA-backed options
Compliance: UL 94 V-0 | RoHS | REACH
FAQs
What is kSil V-0 Medium-Firm Silicone Sponge used for?
It is used in high-compression, flame-resistant sealing applications where structural support and UL 94 V-0 flame performance are required—such as industrial enclosures, EV battery systems, transportation equipment, HVAC units, and lighting.
How does the Medium-Firm grade compare to Medium or Firm?
Medium-Firm is slightly more compressive and supportive than standard Medium, yet not as rigid as Firm.
It is ideal for applications needing strong sealing pressure without sacrificing resilience.
Does this sponge meet UL 94 V-0 flame resistance?
Yes — it is UL 94 V-0 certified, meaning it is self-extinguishing and exhibits low flame propagation in fire-critical environments.
Is it suitable for outdoor and harsh environments?
Absolutely. Silicone provides excellent resistance to UV, ozone, moisture, and temperature extremes, ensuring long-term reliability both indoors and outdoors.
Can kSil V-0 Medium-Firm be supplied as custom die-cut or adhesive-backed parts?
Yes — H-O Products can manufacture die-cut gaskets, PSA-backed components, sheets, strips, and fully custom-engineered sealing geometries.
Contact H-O Products to request kSil® V-0 Medium-Firm Flame-Resistant Silicone Sponge samples, technical data sheets, or custom die-cut gasket solutions for your UL-rated sealing applications - contact us.
