China Silicone Capacity Overhang: 2026-2028 Pricing Outlook
May 2026
TL;DR
China's silicone monomer capacity expanded approximately 80% from 2018 to 2024 — driven by speculation about endless demand growth, easy capital, and provincial-government industrial policy. By 2024-2025, effective capacity utilization has dropped to 65-70% (vs ~85% in 2017-2019), creating a structural overhang of approximately 1.0-1.5 million tonnes of unused capacity. This excess depresses prices, reduces producer margins, and accelerates industry consolidation. The overhang may persist through 2028 absent significant capacity rationalization. Global silicone buyers benefit from below-cyclical-norm pricing in 2026; producers face margin compression.
Capacity History
Chinese silicone monomer (DCS — dimethyldichlorosilane) capacity expansion:
| Year | Effective Capacity (kt/year) | Effective Demand (kt/year) | Utilization | Pricing |
|---|---|---|---|---|
| 2018 | 2,800 | 2,400 | 86% | High |
| 2019 | 3,100 | 2,600 | 84% | High |
| 2020 | 3,400 | 2,500 | 74% | Moderate |
| 2021 | 3,800 | 3,000 | 79% | High (commodity boom) |
| 2022 | 4,400 | 3,300 | 75% | High |
| 2023 | 4,800 | 3,400 | 71% | Moderate |
| 2024 | 5,200 | 3,500 | 67% | Low |
| 2025 | 5,500 (est) | 3,600 (est) | 65% (est) | Low |
The 2018-2024 period saw 86% capacity growth vs. 46% demand growth — creating significant overcapacity. Multiple drivers:
Speculation about silicone demand: 2017-2021 saw multiple Chinese provincial governments include silicone monomer in industrial-policy roadmaps, attracting investment.
Easy capital: Chinese state-bank lending and industry funds were available for silicone-monomer investments at favorable rates.
Vertical integration moves: Some integrated players (Hubei Sun Industries, Tongcheng) added silicone monomer capacity as part of broader silicon-chain integration.
Demand expectations: COVID-driven demand acceleration in 2020-2021 (electronics, medical, EV) led companies to over-extrapolate growth rates.
Why Demand Growth Slowed
The expected demand growth did not materialize at projected rates:
Construction slowdown: Chinese real estate slowed sharply in 2022-2024, reducing silicone sealant demand.
EV growth deceleration: Chinese EV sales growth slowed from 80%+ in 2021 to 30-40% in 2023-2024, reducing silicone TIM and pack demand growth.
Polysilicon-induced silicone-related demand reduction: Some integrated polysilicon-silicone producers reduced silicone monomer output as polysilicon prices crashed (see Polysilicon glut).
Substitution pressure: Some applications shifted from silicone to other materials (cheaper EPDM, ceramic, hybrid systems).
Pricing Implications
Chinese silicone monomer pricing in 2025-2026 reflects the overhang:
| Period | DCS Spot Price (RMB/tonne) | Trend |
|---|---|---|
| 2021 (boom) | 24,000+ | Peak |
| 2022 average | 22,000-25,000 | High |
| 2023 average | 18,000-22,000 | Moderating |
| 2024 average | 15,000-18,000 | Below-cycle |
| 2025 average | 14,000-17,000 | Below-cycle |
| 2026 forecast | 14,000-18,000 | Recovery slow |
For downstream silicone products (silicone oil, rubber, sealant), pricing reflects a smaller compression than upstream DCS but still notable cost relief vs 2021 peaks.
Industry Response
Chinese silicone monomer producers have responded several ways:
Capacity discipline: 2025 saw the first calendar year since 2017 with negative net new silicone capacity additions (closures + delayed projects exceeded new openings).
Vertical integration: Producers with downstream silicone product capability operate the silicone monomer at higher utilization; pure silicone-monomer-only producers face deeper margin compression.
Export push: Chinese silicone monomer exports increased significantly in 2024-2025 to absorb domestic excess.
M&A activity: As discussed in China silicone consolidation, distressed producers are being acquired by Top-5 producers.
Premium grade development: Several producers invested in premium-grade capacity (medical, semiconductor, aerospace) to escape commodity-grade margin compression.
Implications for Buyers
For global silicone buyers:
Below-cycle pricing through 2026: Spot DCS pricing 30-40% below 2021 peaks; downstream silicone product pricing 15-25% below 2021 peaks.
Quality drift risk: Distressed Chinese producers may be less rigorous on quality control. Validate batch consistency.
Logistics impact: Chinese silicone export levels are high; expect volume availability but watch for shipping cost dynamics.
Long-term contracts: Negotiate 18-36 month contracts at current low pricing where possible, knowing the cycle will eventually reverse.
For procurement strategy:
| Time Horizon | Action |
|---|---|
| 2026 | Buy on spot or short contracts at low pricing |
| 2026-2027 | Negotiate long-term contracts at attractive rates |
| 2027-2028 | Watch for capacity rationalization signals — pricing may recover |
| 2028+ | Prepare for cyclical recovery; budget for moderately higher pricing |
Implications for Suppliers
For Chinese silicone monomer producers:
- Marginal producers face shutdown or M&A pressure
- Survivors invest in premium-grade and integrated downstream
- Export-oriented strategy reduces domestic price pressure
For global silicone producers (Wacker, Dow, Shin-Etsu, Momentive):
- Margin pressure from Chinese over-supply
- Premium-grade differentiation more important
- Strategic deceleration of new capacity investment
For silicon-metal producers:
- Reduced silicone monomer pricing flows back as silicon-metal price pressure
- Vertical integration becomes more valuable
Outlook
Through 2028:
Capacity rationalization: 5-10% Chinese silicone monomer capacity may shut down or convert to higher-value products by 2027-2028.
Pricing recovery: Slow recovery in DCS pricing from 2026 lows; back to 18,000-20,000 RMB/tonne by 2028 if rationalization proceeds.
Utilization improvement: Effective utilization improving to 75-80% by 2028 as capacity discipline takes hold.
Industry structure: Top-5 Chinese producers control 70%+ of capacity; smaller producers exit or get acquired.
Global pricing: Sustained price gap between China-supplied and Western-branded silicone narrows as Chinese producers move upmarket.
Related Reading
China silicone consolidation for the related M&A activity. Polysilicon glut for the related upstream picture. Silicone oil category for product-level pricing context.