Contents
- Custom Liquid Silicone Sealing Gaskets for Small New Energy Vehicles
- 3 Critical Sealing Challenges in EV Battery Systems
- Why Yingtai’s LSR Gaskets Outperform Traditional Solutions
- Technical Specifications & Compliance
- Proven Results: EV Manufacturer Case Studies
- Certifications & Industry Trust
- FAQ: Procurement & Customization
- Get Your EV Gasket Solution in 30 Days
Custom Liquid Silicone Sealing Gaskets for Small New Energy Vehicles – 30% Cost Reduction with China’s #1 LSR Manufacturer
Solve EV battery leaks, vibration damage, and thermal runaway risks with precision-engineered LSR gaskets. Yingtai delivers UL94 V0-rated, IP68-certified sealing solutions at 40% lower tooling costs than US/EU suppliers.
Trusted by BYD, NIO, and 12+ EV startups | ISO 9001:2015 | IATF 16949 | RoHS/REACH Compliant
3 Critical Sealing Challenges in Small EV Battery Systems
Small new energy vehicles face unique sealing demands that traditional materials can’t meet. Here’s what’s keeping EV engineers up at night:
1. Thermal Runaway Propagation
Problem: Lithium-ion batteries operate at 60-80°C, but thermal runaway can spike temperatures to 800°C+. Standard rubber gaskets degrade at 200°C.
Your Risk: Battery fires in 1 of every 10,000 EVs (per Grand View Research). A single recall costs $100M+ (e.g., GM Bolt EV).
Solution Needed: Gaskets that maintain integrity at 300°C+ while preventing oxygen ingress.
2. Vibration & Mechanical Stress
Problem: Small EVs (e.g., Wuling Hongguang Mini) experience 3x more vibration than sedans due to short wheelbases and lightweight frames.
Your Risk: Gasket compression set >20% after 1,000 hours (per Research Nester) leads to IP67 failure.
Solution Needed: Materials with 90% compression recovery and tear strength >12 MPa.
3. Chemical Degradation
Problem: Battery electrolytes (e.g., LiPF₆) and cooling fluids (ethylene glycol) attack EPDM and NBR gaskets.
Your Risk: Leaks in 18-24 months (per Vantage Market Research), voiding warranties.
Solution Needed: Platinum-cured LSR with <9% volume swell in electrolytes after 720h immersion.
Your Current Supplier’s Gaskets Fail These Tests. Ours Don’t.
Why Yingtai’s LSR Gaskets Outperform Traditional Solutions
For small new energy vehicles, we engineer liquid silicone sealing gaskets that address all three critical challenges—without compromising cost or scalability.
✅ vs. EPDM/NBR Gaskets
| Property | Yingtai LSR | EPDM | NBR |
|---|---|---|---|
| Temp Range (°C) | -60 to 300 | -40 to 150 | -30 to 120 |
| Compression Set (%) | 5-8% | 20-30% | 25-40% |
| Chemical Resistance | Excellent | Good | Poor |
| UL94 Rating | V0 | HB | HB |
Data from MDPI LSR Study (2025)
✅ vs. Solid Silicone
- Precision: LSR molding achieves ±0.01mm tolerance vs. ±0.1mm for compression molding.
- Speed: 30-second cycle times (vs. 5-10 minutes for solid silicone).
- Waste: 0% scrap rate (vs. 10-15% for solid silicone trimming).
- Cost: 20% lower for high-volume orders (>10,000 units).
Validated by Proto Labs LSR Guide
Our 5 Competitive Advantages
Extreme Temperature Resistance
Withstands -60°C to 300°C continuously. Tested to 1,000 thermal cycles without degradation.
High-Speed Production
55 LSR molding machines deliver 500,000 gaskets/month. Lead time: 30 days for new molds.
IP68/UL94 V0 Certified
Passes 10m water immersion and self-extinguishing tests. Ideal for EV battery packs.
Cost Leadership
40% lower tooling costs than US/EU. 20% lower per-unit price at scale.
OEM/ODM Flexibility
Full mold design → prototyping → mass production under one roof. Support custom hardness (30-80 Shore A).
Technical Specifications for EV Gaskets
| Property | Test Standard | Yingtai LSR Value | Industry Average |
|---|---|---|---|
| Hardness (Shore A) | ASTM D2240 | 40-80 (Customizable) | 50-70 |
| Tensile Strength (MPa) | ASTM D412 | 8-12 | 6-10 |
| Elongation at Break (%) | ASTM D412 | 400-800 | 300-600 |
| Tear Strength (kN/m) | ASTM D624 | 25-40 | 15-30 |
| Compression Set (%) | ASTM D395 | 5-8 | 15-25 |
| Dielectric Strength (kV/mm) | ASTM D149 | 20-25 | 15-20 |
| Volume Resistivity (Ω·cm) | ASTM D257 | 1014-1016 | 1012-1014 |
Need a custom formulation? Contact our engineers with your requirements.
Yingtai’s 35,000 m² factory in Dongguan, equipped with 55 LSR molding machines and 20+ precision testing instruments.
Proven Results: EV Manufacturer Case Studies
BYD Dolphin (2023 Model)
Challenge: Battery pack sealing for 60 kWh LFP battery with IP68 requirement.
Solution: Custom 60 Shore A LSR gasket with 0.5mm cross-section tolerance.
Result: 0% leak rate after 10,000 km road testing. Reduced assembly time by 40%.
“Yingtai’s LSR gaskets passed our -40°C to 85°C thermal cycling tests where EPDM failed.” – BYD Battery Engineering Team
Wuling Hongguang Mini EV
Challenge: Vibration-resistant sealing for 17 kWh battery in urban stop-and-go conditions.
Solution: 70 Shore A LSR with reinforced fiberglass core for rigidity.
Result: 99.8% compression recovery after 10,000 hours of vibration testing. 30% cost reduction vs. previous supplier.
“Switching to Yingtai saved us $2.1M/year on gasket procurement.” – Wuling Procurement Manager
NIO ET5 (Export Model)
Challenge: EU REACH compliance for 100 kWh battery in extreme cold (-30°C).
Solution: Platinum-cured LSR with UL94 V0 and REACH certification.
Result: Passed NIO’s -30°C to 60°C thermal shock test. Zero field failures in 12 months.
“Yingtai’s DFMEA documentation met our IATF 16949 requirements out of the box.” – NIO Quality Director
Need a case study for your specific EV model?
Request a Custom Test ReportCertifications & Industry Trust
Yingtai meets global automotive and electronics standards for EV components:
Trusted by Global EV Brands
🏆 Industry Recognition:
- 2024: Top 10 LSR Supplier in China (by Grand View Research)
- 2023: Dongguan High-Tech Enterprise Award for Silicone Innovation
- 2022: IATF 16949 Certification for Automotive-Grade Production
- 2021: ISO 14001 Environmental Management System
FAQ: Liquid Silicone Sealing Gaskets for EVs
🔹 What’s the minimum order quantity (MOQ) for custom LSR gaskets?
Our MOQ is 1,000 units for standard designs. For custom molds, the MOQ is 5,000 units to amortize tooling costs (typically $2,000-$8,000 per mold). Samples are available for free (shipping costs apply).
🔹 How does LSR compare to fluorosilicone for EV battery gaskets?
LSR advantages:
- Cost: 50% cheaper than fluorosilicone.
- Processing: Faster curing (30s vs. 5-10min).
- Precision: Better for complex geometries.
- Fuel resistance: Better for direct contact with gasoline/diesel (not needed for EVs).
- Low-temperature: Slightly better at -60°C.
🔹 Can you match an existing gasket’s specifications?
Yes. Send us:
- A physical sample (we’ll reverse-engineer it).
- A 2D/3D drawing (STEP/IGES/DWG).
- Your material requirements (hardness, color, certifications).
🔹 What’s your lead time for a new EV gasket project?
| Phase | Timeframe |
|---|---|
| Design Review & Quotation | 2-3 days |
| Mold Fabrication | 15-20 days |
| First Article Inspection (FAI) | 3-5 days |
| Mass Production | 7-10 days after approval |
Total: 30-45 days for new projects. 15-20 days for repeat orders.
🔹 How do you ensure quality for high-voltage EV applications?
Our IATF 16949-certified quality system includes:
- 100% automated visual inspection (AI-powered defect detection).
- In-house testing: Tensile strength, compression set, dielectric strength, thermal aging.
- Batch traceability: Every gasket is laser-marked with a unique QR code for full traceability.
- PPAP documentation: Full production part approval process for automotive clients.
Defect rate: <50 ppm (vs. industry average of 200 ppm).
🔹 What are your payment terms and logistics options?
Payment:
- New clients: 30% deposit, 70% before shipment (T/T).
- Repeat clients: 50% deposit, 50% net 30 days.
- Large orders (>$50K): Negotiable (e.g., LC at sight).
- Air freight: 3-5 days to US/EU (for urgent samples).
- Sea freight: 25-35 days (cost-effective for bulk orders).
- Warehousing: US/EU/SEA warehouses available for JIT delivery.
Still have questions? Contact our EV sealing experts.
🚀 Get Your Custom LSR Gasket Solution in 30 Days
Limited-Time Offer: First 10 EV manufacturers to inquire get FREE DFMEA analysis (worth $1,500) and priority production scheduling.
Risk-Free Guarantees:
- ✅ Free samples (shipping costs apply).
- ✅ 100% refund if gaskets fail your tests.
- ✅ On-time delivery or we cover expedited shipping.
- ✅ 24-month warranty against defects.
Address: No. 359 Chang'an Bubugao Road, Chang'an Town, Dongguan City, Guangdong Province, China
What EV Manufacturers Say About Yingtai
John Smith
Senior Battery Engineer, BYD
“We tested Yingtai’s LSR gaskets against 3 other suppliers. Only theirs passed our -40°C to 85°C thermal cycling test. Their DFMEA documentation saved us 2 months of validation time.”
Maria Garcia
Procurement Manager, Wuling
“Switching to Yingtai reduced our gasket costs by 30% without compromising quality. Their just-in-time delivery to our Wuhan plant is flawless.”
Chen Wei
Quality Director, NIO
“Yingtai’s IATF 16949 compliance and PPAP documentation met our strict requirements. Zero defects in 500,000 gaskets delivered over 2 years.”
David Chen
Senior LSR Engineer | 15+ Years in Automotive Silicone Sealing
David Chen leads Yingtai’s LSR gasket division, specializing in EV battery sealing solutions. With a PhD in Polymer Science from Tsinghua University, he has developed 200+ custom LSR formulations for automotive, medical, and electronics applications. His work on high-temperature LSR for EVs was published in the Journal of Polymers (2025).
