Market evolution: Polymeric MDI (CN 390931) — 2015–2025

Introduction

This report examines the evolution of EU trade in polymeric MDI (CN 390931), a key isocyanate used in polyurethane production, over the period 2017–2025. Polymeric MDI is a critical input for construction insulation, automotive components, and refrigeration — sectors central to Europe's industrial and climate-policy agendas. Drawing on EU trade data, the analysis identifies three major dynamics: a dramatic surge in imports that has narrowed the EU's trade surplus, a massive expansion of intra-EU production capacity, and growing concentration and volatility in import supply chains that raise strategic questions about the EU's exposure to external shocks.

1. The Import Surge and Erosion of the EU Trade Surplus

1.1 Imports grew far faster than exports

The most striking feature of the 2017–2025 period is the asymmetry between import and export growth. While EU exports grew modestly in value (+11.5%) and quantity (+11.3%), imports surged by 176.4% in value and 251.8% in volume.

Source: Trade overview

The EU's trade surplus narrowed from €932 million to €854 million, a decline of 8.4% — not yet dramatic in absolute terms, but the trajectory is notable given the fourfold increase in import volumes.

1.2 Asian suppliers replaced transatlantic ones

The geographic composition of EU imports shifted radically. China and South Korea emerged as the dominant suppliers, while US imports collapsed:

Source: Top partners

South Korea's growth of 342% is particularly striking, making it the EU's single largest import source by 2025 (€149 million). Together, China and South Korea accounted for nearly €288 million — over 90% of total EU imports in 2025. The collapse of US-origin imports (−92%) likely reflects both the re-routing of global MDI trade flows and the expansion of Asian capacity relative to North American supply.

1.3 Import prices fell sharply as volumes surged

Import unit prices dropped 21.4%, from €1,963/t to €1,542/t, while export prices remained nearly flat (+0.2% at ~€1,725/t). This divergence suggests that Asian producers — particularly Chinese and Korean firms — have been absorbing market share through competitive pricing, compressing the EU's pricing premium in the process.

2. Massive Intra-EU Capacity Expansion Reshapes the Production Landscape

2.1 EU production grew by an extraordinary margin

The data on EU production volumes reveals a dramatic expansion: production quantity increased by 1,712% (from ~84,000 tonnes to ~1.52 million tonnes) and production value by 1,909% (from €119 million to €2.39 billion). These figures indicate that the EU has substantially scaled up its own MDI manufacturing capacity over the period, likely driven by major investments from incumbent producers such as BASF, Covestro, and Dow.

2.2 Belgium, Germany, and the Netherlands anchor the EU export base

The intra-EU distribution of exports confirms a highly concentrated production base. Belgium alone accounted for €530 million in exports in 2025 (+43.8% from 2017), followed by the Netherlands (€144 million, −41.8%) and Germany (€161 million, −21.1%). Spain emerged as a rising exporter (+37.9% to €175 million), while Hungary more than doubled its exports (+112.9%).

Source: Top reporters

The decline in Dutch and German export values is noteworthy: it may reflect a shift in these countries' roles from export-oriented production toward serving the intra-EU market, or it could indicate that Belgium has consolidated its position as the EU's primary MDI export hub (consistent with its strong specialisation score of RSCA 0.47).

2.3 Export markets diversified geographically

EU exports targeted a broad set of partners, with Türkiye (+33.7%) and the United States (+207.8%) showing the strongest growth among top destinations. The UK remained the largest single market despite a 39.4% decline to €147 million — likely influenced by post-Brexit trade friction. Russian exports fell 53.0%, consistent with the EU sanctions regime following 2022.

Source: Top partners

3. Rising Import Concentration, Volatility, and Strategic Exposure

3.1 Import supply chains became more concentrated

The Herfindahl-Hirschman Index (HHI) for imports rose by 69.9%, from 2,548 to 4,329 — crossing into territory that economists typically regard as "highly concentrated" (above 2,500). In contrast, the export HHI remained broadly stable at ~1,080–1,172, reflecting a more diversified set of destination markets.

Source: Concentration

This concentration increase is largely explained by the dominance of China and South Korea, which together absorbed import market share from previously diversified sources (US, UK, Saudi Arabia).

3.2 Import volatility is markedly higher than export volatility

The coefficient of variation of import flows from key partners is substantially higher than for exports. Among imports, the US (CV 1.38), Singapore (2.19), and UAE (1.78) show extreme instability. By contrast, the EU's main export destinations — the UK (CV 0.13), Switzerland (0.09), and Türkiye (0.21) — display far more predictable trade patterns.

This asymmetry means that while the EU's export base is relatively stable, its import supply is subject to significant year-to-year swings — a vulnerability that intensifies as import dependence grows.

3.3 The 2021 price shock was a defining event

Three major price shocks were detected, all centred on 2021 — the year of post-COVID supply-chain disruptions and the global energy crisis:

Source: Supply shocks

The UK export price shock (abnormality score 861) stands out as extreme — likely driven by a combination of Brexit-related trade frictions, logistics bottlenecks, and the broader MDI price spike that accompanied the 2021 energy crisis. South Korean import prices jumped 86%, reflecting the global tightening of MDI supply.

3.4 Net import reliance narrowed but the EU remains a strong net exporter

The net import reliance indicator moved from −478% to −67%, an 86% improvement (i.e., less negative). The EU is still a decisive net exporter of polymeric MDI, but the rapid import growth means its relative self-sufficiency has declined meaningfully. Trade intensity dropped 68.3% and export propensity fell 75.5%, suggesting that the expanding EU production base is increasingly oriented toward the domestic market rather than exports.

Conclusion

Between 2017 and 2025, the EU's polymeric MDI market underwent a structural transformation. The EU remains a major net exporter with a €854 million trade surplus, but the import side of the equation has changed dramatically: volumes quintupled, the source countries shifted decisively toward China and South Korea, and import prices fell 21% — signalling intensifying competitive pressure from Asian producers.

At the same time, EU production capacity expanded enormously (over 17× in volume), suggesting that the region's manufacturers have invested heavily to meet growing domestic demand — particularly from the construction and automotive insulation sectors driven by the EU's climate agenda. This production surge has helped maintain the EU's net exporter status, even as import penetration has accelerated.

The key risk going forward is concentrated and volatile import supply chains. The import HHI now sits above 4,300, and the volatility data shows that alternative suppliers (US, Singapore, UAE) are far less predictable than the two dominant Asian sources. Should geopolitical tensions, trade restrictions, or production disruptions affect Chinese or Korean MDI exports, the EU would face limited short-term substitution options. The 2021 price shock — when export prices to the UK spiked nearly 50% — offers a preview of how quickly market conditions can deteriorate when multiple supply shocks coincide.

For policymakers and industry stakeholders, the data points to a need for continued investment in EU production resilience, diversification of import sources, and close monitoring of the competitive dynamics emerging from Asia's rapidly expanding MDI capacity.