Industry Background

The global EPDM sealing strip market was valued at approximately USD 5.29 billion in 2025 and is projected to reach USD 9.54 billion by 2034, with a compound annual growth rate of 6.79%. China has maintained the world’s top position in both automobile production and sales for 17 consecutive years; by 2025, the penetration rate of new-energy vehicles is expected to reach 47.94%, driving demand for automotive seals to 285,500 tons and expanding the market size to RMB 27.434 billion. The global automotive rubber seals market was estimated at around USD 21.19 billion in 2025 and is forecast to grow to USD 33.24 billion by 2034.

The sealing industry is currently facing the following six major challenges:

Fluctuations in raw material costs have squeezed profit margins.

Automotive OEMs are imposing increasingly stringent requirements for low odor and low VOC emissions, placing significant pressure on compliance with environmental regulations.

Intense market competition is squeezing the operating space of small and medium-sized enterprises.

The extrusion process is unstable, frequently resulting in defects such as a rough surface, dimensional deviations, and porosity.

End-use applications are imposing increasingly stringent requirements on compression set and ozone‑aging resistance.

Global supply chain instability is impacting on-time deliveries.

First Solutions

1. Cost volatility puts profit under pressure. 
Use First® LF-34 Flow Dispersant or First® LF-33 Flow Aid for Extrusion 
Reduce the Mooney viscosity of EPDM compounds, shorten mixing time by 15%–20%, and save 15–20 kWh of electricity per ton. LF‑33 is specially formulated for extrusion, minimizing extrudate swell and reducing scrap. 
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2. Stringent environmental regulations impose high requirements for low odor and low VOCs. 
Use First® EM33A-75GE Low-Odor EPDM Compound Accelerator 
Using high-molecular-weight, high-melting-point, low-volatility raw materials, the vulcanization process generates extremely low levels of VOCs, helping to pass OEM odor tests (such as VDA 270) and avoiding the formation of nitrosamines. 
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3. Fierce market competition and price wars driven by low pricing 
Use First® EM33-75GE Compound Accelerator for EPDM Applications 
A single product replaces multiple conventional accelerators, simplifying formulations and reducing inventory; it delivers high vulcanization efficiency, excellent flatness, and consistent quality, enabling the company to secure long-term orders from premium automotive manufacturers. 
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4. Instability in the extrusion process, resulting in surface defects, dimensional inaccuracies, and bubble formation. 
Use First® LF-33 Extrusion Flow Aid  +  First® CaO-80GE Dehumidifying and Defoaming Agent 
LF-33 ensures a smooth seal‑strip surface and dimensional stability; CaO‑80GE absorbs moisture, eliminates bubbles in microwave and hot‑air vulcanization lines, and reduces the scrap rate by 30%–50%. 
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5. High performance requirements (compression set / ozone resistance)

Low compression set: Use EM33-75GE + PDM-75 Anti-reversion agent , significantly improving long-term sealing performance.

Ozone aging resistance: Use   First® ZnO-H80GE Active Zinc Oxide , to enhance the aging resistance of the rubber compound.

Light-colored/colored sealing strips resistant to yellowing: Use   First® MAC-1489 Yellowing-Inhibition Accelerator , long-term use ensures color stability (yellowing resistance rated at 4–5). 
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6. Supply chain instability and long lead times

Leveraging dual bases in Dongguan and Nanjing, with warehouses and service teams located in Vietnam, Chongqing, Chengdu, Fujian, and other regions, we operate proprietary logistics networks in the Pearl River Delta and the Yangtze River Delta. By shipping from nearby facilities, we’ve reduced delivery times to 3–5 days and lowered customers’ inventory burdens by 30%.

[Consultation on Supply Chain Solutions]

Foster helps you break the deadlock with concrete products and quantifiable value. 
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Data sources: Compiled from public reports by QYResearch, Fortune Business Insights, Expert Market Research, the China Rubber Industry Association, the China Association of Automobile Manufacturers, and others (2025–2026).

Specific product performance may vary depending on the formulation and manufacturing process; we recommend requesting a sample for testing.