Product Overview
kSil® V-0 Firm Flame-Resistant Silicone Sponge — Technical Overview & FAQs
Product Overview
kSil® V-0 Firm Flame-Resistant Silicone Sponge is a high-density closed-cell silicone sponge engineered for UL 94 V-0 flame performance, high compression sealing, and maximum structural stability in harsh thermal and environmental conditions.
Compared to softer grades, the Firm density provides superior load support, higher compression resistance, and excellent dimensional stability, making it ideal for applications requiring robust gasketing, firm interface pads, and fire-rated enclosure sealing under increased mechanical pressure.
kSil® V-0 Firm maintains exceptional performance across extreme temperatures, resists UV and ozone degradation, and exhibits low compression set—ensuring long-term reliability in EV battery assemblies, electronics, aerospace, lighting systems, and industrial enclosures.
Applications
High-compression UL 94 V-0 gaskets
Firm, fire-rated enclosure and panel seals
EV battery pack insulation and compartment seals
Aerospace and transportation fire-safety gasketing
LED lighting housings & equipment fixtures
High-load thermal and environmental barrier pads
Industrial machine, HVAC, and appliance flame-resistant sealing
Key Properties
Material Type: Closed-cell silicone sponge (Firm density)
Flame Rating: UL 94 V-0 (self-extinguishing)
Compression Force: High — for strong mechanical sealing and load support
Density: Highest density among V-0 sponge grades for maximum rigidity
Compression Set: Excellent long-term recovery under elevated loads
Temperature Range: –67 °F to +446 °F (–55 °C to +230 °C)
Water Absorption: Very low (fully closed-cell structure)
Environmental Resistance: Outstanding UV, ozone, and outdoor stability
Chemical Resistance: Excellent resistance to oils, solvents, and aging
Formats Available: Sheets, rolls, strips, die-cut components, PSA-backed
Compliance: UL 94 V-0 | RoHS | REACH
FAQs
What is kSil V-0 Firm Silicone Sponge used for?
It is used in high-compression, flame-critical sealing applications where maximum firmness, UL 94 V-0 flame resistance, and structural support are required—such as EV battery packs, electronics, control panels, aerospace systems, and industrial enclosures.
How firm is the Firm grade compared to other kSil V-0 densities?
Firm is the most rigid and compression-resistant in the lineup.
Compared to Medium-Firm or Medium, it provides:
Higher load support
Greater dimensional stability
Lower deflection under pressure
Does kSil V-0 Firm meet UL 94 V-0 flame requirements?
Yes — this grade is UL 94 V-0 certified, meaning it rapidly self-extinguishes and provides exceptional flame safety for electronics, EV, and industrial applications.
Can Firm silicone sponge be used outdoors or in harsh environments?
Absolutely. Silicone offers superior UV, ozone, humidity, and temperature resistance, ensuring long-term outdoor durability.
Is kSil V-0 Firm available in custom-cut or adhesive-backed parts?
Yes — H-O Products manufactures die-cut gaskets, PSA-backed seals, strips, sheets, and custom engineering shapes for OEM production environments.
Contact H-O Products to request kSil® V-0 Firm Flame-Resistant Silicone Sponge samples, engineered gasket solutions, or technical support for your flame-rated sealing applications - contact us.
