Standard durability wasn’t enough. For our client—a rising star in the Electric Vehicle (EV) manufacturing sector in Dubai—the challenge wasn’t just sealing out dust; it was containing a disaster.
During simulated Thermal Runaway testing, their prototype battery packs were failing on a critical parameter: Smoke Toxicity. The standard EPDM Sealing they were using was melting and releasing hazardous fumes, violating the increasingly strict global safety benchmarks for 2026 rolling stock and cabin safety.
They needed a Passive Fire Protection (PFP) barrier that could self-extinguish within seconds while maintaining a durable ingress protection rating of IP69K.
The Solution: Halogen-Free FR-EPDM
We replaced their legacy elastomer with a custom-formulated, Halogen-free flame retardant EPDM compound. This high-performance material was chosen specifically because it meets the dual criteria of the UL 94 V-0 flammability rating and EN 45545-2 standard (the stringent European rail standard for low-smoke toxicity).
This compound utilizes Intumescent Sealing Systems technology—it expands slightly when exposed to intense heat, creating a dense char barrier that seals the gap and suppresses oxygen flow.
The Measurable Results:
• 🔥 Flame Duration: Reduced from 60 seconds to less than 5 seconds (Self-extinguishing).
• 💨 Smoke Density: Reduced by 90%, easily complying with EN 45545-2 requirements.
• 🔋 Operational Temperature: Maintained flexibility and seal integrity from -50°C up to 150°C.
In 2026, your gaskets are your primary defence line. Investing in certified Fire Rated Elastomers isn’t just about compliance; it’s about pioneering a safer standard for your customers.
#EPDM #PassiveFireProtection #EVSafety #EN45545 #AutomotiveEngineering #UL94V0 #FlameRetardant #DubaiManufacturing #CaseStudy2026
FAQ
No. While standard EPDM is world-class for UV and weather resistance, it is naturally flammable. To achieve a “Fire-Rated” status, the rubber must be specifically compounded with flame-retardant additives to meet standards like UL 94 V-0 or EN 45545-2.
This is one of the strictest flammability ratings. It means that when a vertical flame is applied to the EPDM, the material self-extinguishes within 10 seconds, and most importantly, it does not drip flaming particles that could spread the fire to other components.
Traditional flame retardants often used halogens (like Chlorine or Bromine), which release toxic, corrosive smoke during a fire. Halogen-Free FR-EPDM is mandatory in mass transit and enclosed spaces because it produces significantly lower smoke toxicity, protecting both human life and sensitive electronic equipment from acid corrosion.
Absolutely. Unlike other fire-rated materials that can be brittle, FR-EPDM retains EPDM’s core DNA: excellent resistance to Ozone, UV, and temperatures ranging from -50°C to +150°C. This makes it ideal for EV charging stations and solar infrastructure.
These represent “Hazard Levels” for rail applications. HL3 is the most stringent level, required for trains traveling through long tunnels or sleeper cars. Our FR-EPDM is engineered to meet HL3, offering the highest possible safety margin for any transit environment.