This liquid silicone weather resistant sealing ring is specially developed for new energy vehicles, with excellent high and low temperature resistance, anti-aging performance, waterproof and dustproof ability, not easy to deform after long-term use, suitable for sealing of multiple parts such as body and battery pack, effectively improving vehicle operation reliability and service life.
Material
Industrial LSR
Hardness
Shore A 50-70
Temperature
Certifications
Applications
-60°C ~ +220°C
Colors
Black, White, Transparent, Customizable
# Liquid Silicone New Energy Vehicle Weather Resistant Sealing Ring
The Liquid Silicone New Energy Vehicle (NEV) Weather Resistant Sealing Ring is a high-performance custom-molded sealing component engineered to address the extreme environmental, thermal, and operational demands of modern electric, plug-in hybrid, and fuel cell vehicles. Manufactured via injection molding from medical and automotive-grade liquid silicone rubber (LSR), this sealing ring delivers exceptional long-term reliability for critical NEV systems that require protection against moisture, dust, temperature fluctuations, and chemical exposure while maintaining consistent compression set resistance over the vehicle’s 15+ year service life.
Unlike traditional EPDM or nitrile rubber seals, this LSR-based sealing ring is purpose-built for NEV-specific use cases, where sealing integrity directly impacts battery safety, powertrain efficiency, and passenger comfort. It maintains stable performance across a -60°C to 220°C operating range, exhibits zero brittleness after 1000 hours of UV and humidity aging, and is compatible with common NEV coolants, lubricants, and battery electrolyte additives. Its precision-molded dimensional tolerance of up to ±0.02mm eliminates gaps in high-vibration environments, preventing water ingress that could trigger thermal runaway in battery packs or short circuits in high-voltage electrical systems.
All raw materials for the sealing ring comply with IATF 16949 automotive material standards and RoHS 2.0 restriction requirements, with custom formulations available to meet specific application needs. Typical material properties include:
The sealing ring’s physical properties are validated via third-party automotive testing laboratories to ensure compliance with ISO 10149 rubber seal standards:
The sealing ring is manufactured via high-precision liquid silicone injection molding with the following standard process parameters, adjustable for custom geometries:
Unlike EPDM seals that degrade after 3–5 years of outdoor exposure, this LSR sealing ring retains 90% of its mechanical properties after 1000 hours of accelerated UV, humidity, and thermal cycling testing, equivalent to 15+ years of real-world NEV operation in extreme climates ranging from arctic cold zones to tropical coastal regions. It resists cracking, brittleness, and permanent deformation even after repeated exposure to road salt, acid rain, and bird droppings, eliminating the need for mid-life seal replacements that increase vehicle maintenance costs.
With a 1000-hour high-temperature compression set of ≤15%, the sealing ring maintains consistent contact pressure against mating surfaces even under continuous 25% compression in high-heat powertrain and battery pack environments. This eliminates the risk of gradual sealing failure caused by rubber stress relaxation, a common failure point for thermoplastic elastomer seals that can lead to battery water ingress and high-voltage component short circuits.
The material maintains full flexibility at -60°C, preventing seal cracking during cold start operations in high-latitude regions, and retains its structural integrity at continuous 220°C operating temperatures, making it suitable for sealing around e-motor stator housings, fuel cell stack components, and high-voltage charging connectors that generate significant operational heat. Unlike nitrile rubber seals that harden below -20°C and degrade above 120°C, this LSR seal eliminates temperature-related sealing failure across all global NEV operating environments.
We offer tailored material modifications to meet specific application needs: flame-retardant UL 94 V-0 grades for battery pack sealing to contain thermal runaway risks, self-lubricating grades for charging port seals to reduce plug insertion force by 30%, and low-VOC grades for interior cabin seals that meet ISO 10540 automotive air quality standards, eliminating unpleasant odors inside the passenger compartment.
This LSR weather-resistant sealing ring is deployed across all critical NEV systems where sealing reliability directly impacts vehicle safety and performance:
Standard sealing rings are available in outer diameter ranges from 5mm to 500mm, with cross-sectional diameters ranging from 1mm to 10mm, with no minimum order quantity for custom sizes. When specifying dimensions, provide:
Custom non-circular geometries (square, rectangular, irregular profiled seals) are also available upon request, with 3D prototype sampling completed within 7 working days.
All our Liquid Silicone NEV Weather Resistant Sealing Rings are manufactured in IATF 16949 certified production facilities, with a 0 PPM defect rate target for mass production. Our quality control process includes:
We offer a 5-year quality warranty for all sealing rings installed per our design guidelines, covering all defects in material and workmanship, with dedicated technical support teams available to assist with groove design, installation guidance, and failure analysis for field applications.
