Liquid Silicone Rubber for New Energy Applications: Sealing, Insulation, and Performance

Liquid Silicone Rubber for New Energy Applications: Sealing, Insulation, and Performance

Dongguan Times Silicon Industry Co., Ltd. is a manufacturer specializing in R&D, production, and sales of new silicone materials, established in 2021 and officially commencing operation on July 1, 2022. The company's core products include liquid silicone, platinum catalyst, silicone treatment agents, silicone adhesives, and silicone foam. Its manufacturing facility covers 15,000 square meters with an annual production capacity of 5,200 units, and it employs approximately 42 staff, including a dedicated R&D team of 10 engineers. Export business accounts for 55% of total sales, with major markets including China, South Korea, the United States, Japan, and Africa.

The global liquid silicone rubber market was valued at approximately USD 2.8 billion to 3.8 billion in 2024, with expectations to reach USD 5.0 billion to 7.55 billion by 2030-2035 (Grand View Research / GMI / MRFR). This growth is driven by increasing demand from new energy, medical, and electronics sectors, where LSR provides critical sealing, insulation, and thermal management properties.

The Problem: Demanding Conditions in New Energy Systems

New energy vehicles, photovoltaic modules, wind power generators, and hydrogen energy equipment operate under extreme conditions: high voltages, temperature fluctuations from -60°C to 200°C, moisture, dust, and chemical exposure. Conventional elastomers often fail under such stress, leading to seal leakage, insulation breakdown, or premature aging. Engineers require materials that combine flexibility, dielectric strength, thermal stability, and long-term reliability—precisely the characteristics of platinum-cured liquid silicone rubber.

Industry Background: LSR as the Material of Choice

Liquid silicone rubber (LSR) is an addition-curing, platinum-catalyzed elastomer that cures into a high-purity, low-volatility product. Approximately 63% of battery pack sealing systems in electric vehicles now utilize silicone elastomers for flexibility and durability (Precedence Research / IEA). In photovoltaic systems, insulating sleeves coated with silicone resin protect wiring from heat and voltage. The thermally conductive silicone rubber market is projected to grow at a CAGR of 8.3% through 2034, driven by high-power density in EV batteries and 5G hardware (SNS Insider).

Detailed Solution: Times Silicon’s LSR Ecosystem

Dongguan Times Silicon Industry Co., Ltd. addresses these challenges through a comprehensive product portfolio that covers the full LSR value chain—from base polymers to finished compounds and catalysts. The company holds ISO9001 International Quality Management System Certification, and all products have obtained RoHS, REACH, FDA, LFGB, and halogen-free certifications, ensuring compliance with global safety and environmental standards.

Key product categories relevant to new energy applications include:

• Vinyl Silicone Oil (models TVF-L-50 through TVF-H-35W): A vinyl-terminated polydimethylsiloxane with clear appearance, viscosity 35–50W, volatile content <0.5%, and vinyl content 0.037–1.497. Used as a base polymer for LSR compounding, suitable for electronic & electrical appliances, automotive, photovoltaic, and new energy batteries industries.
• Platinum Catalyst (models TPL-1000 through PTR-5000): Transparent liquid with platinum content 1000–5000 ppm, viscosity 320–1000 mPa·s, volatile matter ≤10%. Essential for catalyzing the addition-curing reaction in LSR production. Used in flame-retardant rubber silicone, thermal conductive silicone potting compounds, and Liquid Silicone Rubber.
• Formed Liquid Foamed Silicone Rubber (models BAS-1716, BAS-1812, BAS-80931): Translucent, with hardness 17–51, tensile strength 5–7, elongation at break 300–500, tear strength 15–17. Intended for automotive, photovoltaic, and electrical appliance industries—ideal for lightweight, compressible seals and gaskets.
• Fiber Glass Sleeve with Silicone Resin (models TS3034B through TS6125A/B): A coating of glass fiber insulating sleeves using methylphenyl silicone resin. Hardness 20–35, viscosity 10000–55000, heat resistance 200°C, cold resistance (hardening -55°C, brittleness -73°C). Color options: white, milky white, transparent. Intended for aerospace & defense, photovoltaic & energy storage, and new energy vehicles industries.

In 2023, the company established a wholly-owned subsidiary, Guangdong Times Energy Storage New Material Technology Co., Ltd., dedicated exclusively to the R&D and production of special silicone rubber materials for the new energy sector, including foamed liquid silicone and ceramicized liquid silicone.

Step-by-Step: How to Select the Right LSR for Your Project

1. Define operating conditions: Identify temperature range, voltage stress, UV exposure, chemical contact, and required flame retardancy. For example, EV battery seals demand long-term heat resistance up to 200°C and UL94 V-0 flame rating.
2. Check certification requirements: Medical and food-contact applications require FDA 21 CFR 177.2600, USP Class VI, or ISO 10993. For general industrial use, RoHS, REACH, and halogen-free are baseline. All Times Silicon products meet these certifications.
3. Evaluate mechanical properties: Hardness, tensile strength, tear strength, and elongation. Low-hardness (7±1 Shore A) LSR is used for soft overmolding, while higher hardness (38±1 Shore A) suits structural seals.
4. Consider process compatibility: Injection molding requires low viscosity LSR (4000–25000 mPa·s); dipping or spraying needs solvent-based or high-viscosity systems.
5. Request samples and technical support: Contact the manufacturer with your application details to receive a tailored recommendation and sample material for testing.

Use Cases in New Energy

• EV Battery Pack Sealing: Formed liquid foamed silicone rubber provides compressible, durable gaskets that withstand thermal cycling and vibration while maintaining a tight seal against moisture and dust.
• Photovoltaic Module Insulation: Fiber glass sleeves coated with silicone resin protect internal wiring from high temperatures (200°C) and voltage, meeting UL94 V-0 flame resistance and RoHS/REACH requirements.
• Motor and Transformer Insulation: Silicone resin insulation sleeves are applied to winding wires in electric motors, offering long-term insulation at -60°C to 200°C and resistance to oil mist and dust.
• Fuel Cell and Hydrogen Equipment: Platinum-cured LSR compounds with high purity and low volatile content prevent contamination in sensitive electrochemical environments.

Comparison: Key LSR Product Families

Product Type	Hardness (Shore A)	Temperature Range	Key Application
Formed Liquid Foamed Silicone	17–51	-60°C to 200°C (long-term)	Compressible seals, gaskets
Fiber Glass Sleeve (Silicone Resin)	20–35	-55°C to 200°C (hardening -55°C, brittleness -73°C)	Wire insulation, high-voltage protection
Adult Products LSR (Overmolding)	7±1 to 38±1	Room / medium temperature curing	Soft-touch overmolding, bonding to plastic/metal

Frequently Asked Questions (FAQ)

Conclusion

Liquid silicone rubber is an indispensable material for the new energy industry, offering unmatched thermal stability, electrical insulation, and environmental resistance. Dongguan Times Silicon Industry Co., Ltd., with its ISO9001-certified facility, comprehensive product range, and dedicated new energy subsidiary, provides a reliable source of LSR materials and intermediates. Whether you need base polymers, catalysts, or finished compounds, the company’s 55% export share and experience serving markets in China, South Korea, the United States, Japan, and Africa demonstrate its global capability. Contact the team to explore how their LSR solutions can support your next new energy project.

Contact Information
Name: Mr. Han
Email: 1412531738@qq.com
Phone: +86 13825718161
WhatsApp: +86 13316608735
Company Website
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