China is the world's largest consumer market for rubber seals, with a market size exceeding 100 billion yuan. Industry growth is driven by three main factors: the upgrading of traditional industries, the booming development of emerging industries, and accelerated domestic substitution, forming a dual-engine growth pattern of stable growth in traditional sectors and expansion in emerging sectors. While there is import dependence in the high-end sector, the process of domestic substitution is accelerating, and some companies have already achieved import substitution for their products.
Fluctuations in the prices of upstream raw materials, such as nitrile rubber, affect industry profits. Companies are alleviating pressure through technological substitution, such as bio-based materials. Industry concentration is increasing, with leading companies entering the high-end market, and three major industrial clusters forming in the Yangtze River Delta, Pearl River Delta, and Chengdu-Chongqing regions.
For example, on May 28, 2026, Laiyang Changyu Sealing Technology Co., Ltd. (Changyu) had its IPO application accepted by the Beijing Stock Exchange, planning to raise approximately 310 million yuan for a rubber seal production and processing and R&D center construction project.
The industry is showing development trends of high-end, intelligent, global, service model shifting towards solutions, and collaborative innovation across the industrial chain.
