When the wave of the global new materials industry surges in, a low-key but indispensable organic silicon star - ethyl silicone oil (polydiethylsiloxane, CAS: 63148-61-8) is rapidly rewriting the industry landscape.


The global market is accelerating its expansion, with China holding up half of the country
The latest industry data shows that the global high viscosity ethyl silicone oil market has reached approximately 1.87 billion US dollars in 2024, with a stable compound annual growth rate of 6.8%. By 2026, this number is expected to exceed $2.4 billion, with a compound annual growth rate maintained at a high range of 7% -8%.


What is even more remarkable is that the Asia Pacific region has occupied 42.3% of the global market share, and China, as the absolute core of this region, contributes 68.7% of the total Asia Pacific market. China has over 35 ethyl silicone oil production enterprises with an annual production capacity of about 62000 tons, accounting for 39.2% of the global total production capacity. The domestic market demand is about 48000 tons, which not only achieves high self-sufficiency, but also has considerable export capacity.


Aerospace circuit ignites new growth poles
On January 31, 2026, Shenzhen Debon Interface Materials successfully applied for a patent for thermal conductive silicone grease for aerospace electronic equipment. The core component of its formula is ethyl silicone oil with a viscosity of 50-1000 mPa · s. This patent aims to solve the heat dissipation problem of electronic devices in extreme space environments, expanding the application boundaries of ethyl silicone oil from traditional industrial fields to the high barrier track of aerospace and military industries.


At the same time, at the beginning of 2026, Mount Huangshan Meijia New Materials and Anhui Hecheng Chemical reached a strategic cooperation. The two sides have clearly defined the goal: to complete the preparation for the pilot test and mass production of electronic grade ethyl silicone oil in 2026, and to achieve the import substitution of high-end products in 2027. Runhe Materials has also launched a heavyweight plan - to issue convertible bonds of no more than 370 million yuan to raise funds for the construction of high-end organic silicon new material projects. After completion, it will add 5000 tons/year of electronic grade vinyl silicone oil production capacity.


The oligopolistic monopoly pattern is loosening, and domestic substitution is accelerating
For a long time, the international market has shown obvious oligopolistic characteristics. Dow Chemical (approximately 18.3%), Shinetsu Chemical (approximately 16.7%), and Wacker Chemicals (approximately 14.2%) collectively hold approximately 65% of the global market share. However, the data for 2025 has sent a clear signal: the domestic market share of electronic grade silicone oil has reached 63.4%, a significant increase of 5.6 percentage points from 57.8% in 2024. Japan's Shin Etsu, the United States' Dow Corning, and Germany's Wacker have respectively contracted their shares in China to 18.2%, 12.7%, and 5.7%.


Domestic leading enterprises such as Zhejiang Xin'an Chemical, Jiangsu Hongda New Materials, and Guangzhou Tianci Materials have achieved verification of 12 inch wafer production lines, and some products have passed long-term reliability testing of TSMC's 28nm process packaging adhesive.


Multiple fields advancing simultaneously, prices tending towards rationality
From the application perspective, ethyl silicone oil has formed four pillar areas: electronic appliances (32.7%), building sealing (28.4%), automotive manufacturing (19.6%), and personal care (8.3%). Emerging fields such as 5G communication, new energy vehicles, solar photovoltaics, and energy storage systems are continuously injecting incremental demand.


It is worth noting that the average price of high viscosity ethyl silicone oil in 2024 has increased by 8.5% compared to 2023, but with the gradual release of domestic production capacity and intensified market competition, the price is expected to stabilize in the next two years. The overall profit margin of the industry remains in the range of 15% -22%, and the profit margin of high-end product lines can even reach over 28%.


Conclusion
From lubricating oil for precision instruments to thermal conductive materials for aerospace equipment, from sealant for smartphones to shock absorber components for new energy vehicles - ethyl silicone oil is deeply embedded in every key node of modern industry with its excellent high and low temperature resistance (-70 ℃ to 200 ℃), excellent dielectric properties, and irreplaceable oil solubility.


In 2026, the domestic substitution storm led by Chinese companies has just begun.