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Our high-performance Flame Retardant Putty is a professional-grade sealing and filling solution engineered for the most demanding industrial environments. Specifically developed to integrate fire isolation, airtight sealing, and vibration suppression, this advanced material is indispensable for high-safety sectors such as rail transit, shipbuilding, and new energy vehicle manufacturing. It ensures a critical barrier against fire spread while maintaining structural integrity under extreme conditions.
Certified to the rigorous EN45545-2 HL3 standard—the highest fire protection class for EU rail transit—this halogen-free putty eliminates toxic gas release to ensure personnel safety during evacuations. With a unique non-drying, self-adhesive formula and exceptional thermal stability up to 150°C, it provides a permanent, maintenance-free seal that resists sagging and shrinkage, making it the ideal choice for critical infrastructure and high-precision equipment.
| Fire Rating | EN 45545-2 HL3 (R24-R29) | Smoke Density (Ds) | < 5 (SBI Test) |
|---|---|---|---|
| Adhesive Strength | ≥ 3MPa (ISO 4587) | Temp. Stability | No sagging at 150°C / 48h |
| Halogen Content | < 50ppm (Halogen-free) | Elastic Modulus | 0.8 - 1.2MPa |
| Damping Rate | > 30% @ 200Hz | Deformation Rate | < 1% (-40°C to 150°C) |
| Tear Strength | > 8kN/m | Compliance | REACH SVHC, RoHS 3.0, TB/T 3139 |
Meets the highest EU rail transit standards, ensuring maximum fire isolation and minimal smoke toxicity for enhanced safety.
Non-drying formula prevents hardening, shrinkage, or falling off, ensuring long-term airtight sealing integrity.
Maintains absolute form stability at 150°C, preventing leaks or gaps in high-temperature engine and battery areas.
Effectively dampens high-frequency micro-vibrations, reducing acoustic noise in transformers and precision labs.
Eliminates the release of toxic corrosive gases during combustion, providing a clear escape route for personnel.
Self-adhesive properties allow direct bonding to metal and composites without primers, speeding up production.
Ideal for high-speed rail floor gap sealing and fireproof cable penetration through cabins.
Critical fire isolation for power battery pack spacing and charging pile waterproof sealing.
High-performance sealing for bulkhead fire partitions and vibration-damping for deck equipment.
Fireproof sealing for cabinet bodies and vibration-damping for heavy-duty transformers.
Wall sealing for explosion-proof workshops and joint filling for precision laboratories.
Filling interior trim gaps and engine compartment sealing to prevent fire spread.
| Performance Metric | Traditional Sealants | Our Flame Retardant Putty |
|---|---|---|
| Fire Safety | Basic Flame Retardant | EN 45545-2 HL3 (Highest Class) |
| Toxicity | May release halogen gases | Halogen-Free / Non-Toxic |
| Thermal Stability | Prone to sagging/shrinking | Zero Sagging up to 150°C |
| Maintenance | Periodic replacement needed | 15+ Year Maintenance-Free Life |
| Functionality | Single (Sealing only) | Triple (Fire, Seal, Vibration) |
HL3 is the highest fire protection level for rail transit in the EU. It ensures the material has the lowest heat release and smoke toxicity, which is critical for saving lives during emergency evacuations in enclosed transport environments.
Yes, the product is engineered for high environmental adaptability, maintaining a permanent deformation rate of less than 1% within a wide temperature range from -40°C up to 150°C.
No, it features an intelligent self-adhesive design that allows direct bonding to metal and composite substrates with a final strength of ≥3MPa, simplifying the installation process.
Due to its optimized elastic modulus (0.8-1.2MPa), the putty acts as a dynamic shock absorber, suppressing high-frequency micro-vibrations with a damping rate over 30% @ 200Hz.
Absolutely. Our putty complies with TB/T 3139 VOC limits, REACH SVHC (no detection in 239 items), and RoHS 3.0 standards, ensuring it is safe for both users and the environment.
Unlike traditional sealants that harden over time, non-dry putty remains pliable. This allows it to maintain an airtight seal even during structural movements or thermal expansion, preventing cracks and leaks.
