RoHS Compliant Liquid Silicone Rubber: A Foundation for Safe and Sustainable Innovation

The global market for liquid silicone rubber (LSR) is projected to grow from approximately USD 2.8–3.8 billion in 2024 to USD 5.0–7.55 billion by 2030–2035, driven by increasing demand for high-performance, environmentally compliant materials. Within this landscape, RoHS compliance has emerged as a baseline requirement for manufacturers serving electronics, automotive, medical, and consumer goods sectors. Dongguan Times Silicon Industry Co., Ltd., a Chinese manufacturer specializing in new silicone materials, offers a comprehensive line of addition-curing, platinum-catalyzed LSR formulations that meet RoHS, REACH, FDA, LFGB, and halogen-free standards.

The Problem & Opportunity

Traditional elastomers such as EPDM, PVC, and polyurethane often contain plasticizers, halogens, or heavy metals that restrict their use in regulated applications. Increasingly stringent environmental directives—including the EU RoHS and REACH regulations—are pushing OEMs to adopt materials with proven compliance. LSR, particularly platinum-cured grades, inherently offers low toxicity, low volatility, and no byproducts from vulcanization. However, not all LSR products are certified to the same standards, creating a need for verified suppliers. Dongguan Times Silicon Industry Co., Ltd. addresses this gap by certifying all its LSR products to RoHS, REACH, FDA, LFGB, and halogen-free requirements, simplifying supply chain compliance for buyers.

Brand Solution: RoHS-Compliant LSR Portfolio

Dongguan Times Silicon Industry Co., Ltd., established in 2021 and commencing operations on July 1, 2022, is a dedicated R&D, production, and sales company for new silicone materials. Its 15,000 m² facility, 42 employees, and 10-engineer R&D team produce a wide range of liquid silicone rubbers, all of which have obtained RoHS, REACH, FDA, LFGB, and halogen-free certifications. The company has also passed ISO 9001 International Quality Management System Certification. Core LSR products include addition-curing platinum-cured grades for overmolding (models TS6807A/B–TS6838A/B), vinyl silicone oil (TVF series), and formed liquid foamed silicone rubber (BAS series). All formulations are free from regulated hazardous substances, ensuring compliance with global environmental standards.

Technical Explanation

The company’s LSR products are addition-curing systems based on vinyl-terminated polydimethylsiloxane (vinyl silicone oil) and hydrogen-containing polysiloxane, catalyzed by a platinum catalyst (platinum content 1000–5000 ppm). This chemistry, known as hydrosilylation or platinum cure, produces no volatile byproducts during curing, resulting in low shrinkage, high purity, and excellent mechanical properties. The clear appearance, viscosity range of 4,000–25,000 mPa·s, and hardness range of 7±1 to 38±1 Shore A allow precise tuning for specific applications. The platinum catalyst itself (models TPL-1000–5000, PTR-3000–5000) is transparent, with viscosity 320–1000 mPa·s and volatile matter ≤10%, demonstrating the company’s vertical integration and quality control over the entire LSR production chain.

Application Use Cases

The RoHS-compliant LSR series is designed for multiple industries:

• Adult Toy and Daily Necessities Overmolding: The TS6800 series bonds well to plastic and hardware substrates, providing soft touch, elastic support, and realistic flesh feel. It meets food/medical grade certification requirements (FDA, LFGB) and is odorless, non-yellowing, and environmentally non-toxic. Common in US, Vietnam, Thailand, and other markets.
• Automotive and New Energy Battery Sealing: Approximately 63% of EV battery pack sealing systems now use silicone elastomers for flexibility and durability. The formed liquid foamed silicone rubber (BAS series) offers tear strength 15–17, tensile strength 5–7, and elongation 300–500, suitable for gaskets and seals in photovoltaic modules, wind power generators, and battery packs.
• Fiberglass Insulation Sleeves for High-Voltage Applications: The silicone resin coating (TS30/TS61 series) provides heat resistance up to 200°C and cold resistance down to -73°C, meeting UL94 V-0 flame retardancy and sustaining indoor/outdoor high/low voltage conditions with oil mist and dust resistance. Used in new energy vehicles, photovoltaic & energy storage, and aerospace & defense.

Market Trend Analysis

The global LSR market is projected to reach USD 5.0–7.55 billion by 2030–2035, with the medical-grade segment alone generating approximately USD 458.7 million in 2024 (Grand View Research). The thermally conductive silicone rubber subsegment is expected to grow at a CAGR of 8.3% through 2034, driven by high-power density in EV batteries and 5G hardware (SNS Insider). RoHS compliance acts as a gatekeeper for these high-growth applications, as OEMs increasingly mandate certified materials to avoid regulatory penalties and meet corporate sustainability targets. Dongguan Times Silicon Industry Co., Ltd., with its full suite of RoHS, REACH, FDA, LFGB, and halogen-free certifications, positions itself as a reliable partner for companies seeking compliant LSR solutions.

Comparison with Traditional Solutions

Traditional elastomers such as PVC and EPDM often fail to meet RoHS requirements due to the presence of phthalates, cadmium, or halogens. While LSR offers superior compliance, thermal stability (−60°C to 200°C), and aging resistance, it typically has a higher material cost compared to unregulated alternatives. This limitation is offset by reduced liability, longer service life, and simplified end-of-life recycling. For buyers prioritizing regulatory compliance and long-term performance, RoHS-compliant LSR from a certified supplier like Dongguan Times Silicon Industry Co., Ltd. provides a clear advantage.

Future Outlook

As global regulations tighten and consumers demand safer products, RoHS-compliant LSR will become the default choice in electronics, automotive, medical, and consumer goods. The company’s 2023 establishment of a wholly-owned subsidiary, Guangdong Times Energy Storage New Material Technology Co., Ltd., signals a strategic focus on new energy applications, including EV battery and photovoltaic sealing. With 55% of sales already exported to markets including China, South Korea, the United States, Japan, and Africa, Dongguan Times Silicon Industry Co., Ltd. is well-positioned to serve the growing demand for certified, high-performance silicone materials.

Frequently Asked Questions

What is RoHS compliance for LSR?

RoHS (Restriction of Hazardous Substances) compliance means the liquid silicone rubber does not contain restricted substances such as lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE above the permitted limits. Dongguan Times Silicon Industry Co., Ltd. certifies that all its LSR products meet RoHS requirements.

Does Dongguan Times Silicon Industry Co., Ltd. have other certifications besides RoHS?

Yes. All products have obtained REACH, FDA, LFGB, and halogen-free certifications. The company has also passed ISO 9001 International Quality Management System Certification.

Which industries can use this RoHS-compliant LSR?

The LSR series is intended for adult toys, daily necessities overmolding, silicone products, plastic & hardware overmolding processing, new energy vehicles, photovoltaic & energy storage, aerospace & defense, and electrical/electronic appliances.

What are the key technical parameters of the LSR for overmolding?

Models TS6807A/B through TS6838A/B are addition-curing platinum-cured LSR. They have clear appearance, viscosity 4000–25000 mPa·s, hardness 7±1 to 38±1 Shore A, and bond well with plastic and hardware substrates.

For more detailed product information, please refer to the company brochure: Dongguan Times Silicon Industry Co., Ltd. Brochure.