Market evolution: Expanded clay pellets (CN 68062010) — 2015–2025
Introduction
This report examines the evolution of the EU's extra-Union trade in expanded clay pellets (Combined Nomenclature code 68062010) over the period 2015–2025. Expanded clays are lightweight mineral aggregates used primarily in construction for insulation, drainage, and as a growing medium. The analysis draws on customs-level trade data and production statistics (PRODCOM 23.99.19.20) to identify the main structural shifts, geographic reconfigurations, and vulnerability dynamics that have shaped this market over the past decade.
Over the period under review, the EU expanded clay sector underwent a fundamental transformation: the bloc shifted from a marginal trade deficit to a substantial net-export position, exports nearly doubled in volume, production volumes contracted while production values rose sharply, and the geographic profile of both imports and exports was redrawn. These changes reflect the combined influence of post-Brexit trade reorientation, rising energy and input costs, the construction boom in neighbouring economies, and a broader European turn towards lighter, energy-efficient building materials.
1. From Trade Deficit to Surplus: The EU's Structural Shift in Expanded Clay Trade
1.1 Exports outpaced imports, reversing the trade balance
The most striking development over 2015–2025 is the reversal of the EU's trade balance. In 2015, the EU recorded a small trade deficit of approximately €2.3 million on expanded clays. By 2025, this had swung to a surplus of roughly €14.4 million — a sevenfold improvement.
| Indicator | 2015 | 2025 | Change |
|---|---|---|---|
| Exports (value, EUR) | 30,703,369 | 43,682,089 | +42.3% |
| Exports (volume, t) | 95,570 | 138,632 | +45.1% |
| Imports (value, EUR) | 32,968,908 | 29,284,975 | −11.2% |
| Imports (volume, t) | 23,919 | 13,200 | −44.8% |
| Trade balance (EUR) | −2,265,538 | +14,397,114 | +735.5% |
1.2 Import prices surged while export prices remained flat
Despite a 44.8% contraction in imported volumes, the value of imports declined only 11.2%, indicating a near-doubling of import unit prices — from €1,378/t in 2015 to €2,219/t in 2025 (+61.0%). This likely reflects a compositional shift: the EU increasingly imports higher-value or more processed expanded clay products, while cheaper bulk flows have been absorbed by domestic or intra-EU production.
Export unit prices, by contrast, barely moved, declining marginally from €321/t to €315/t (−1.9%). This suggests that EU exporters compete primarily on volume and logistics proximity rather than on premium pricing.
1.3 Net import reliance turned decisively negative
The net import reliance ratio — measuring the share of apparent consumption met by net imports — shifted from a near-zero −0.6% in 2015 to −6.3% in 2025. A negative value indicates that the EU is a net exporter. The trajectory was not linear: the ratio peaked at +6.6% at some intermediate point (likely around 2018–2019), meaning the EU briefly became a modest net importer before the current export-led position consolidated.
2. Geographic Reorientation: Shifting Partners and Rising Import Concentration
2.1 The United Kingdom dominates both import and export flows
The United Kingdom is by far the EU's largest trade partner for expanded clays in both directions. On the import side, UK-origin expanded clays were valued at €21.9 million in 2015 and €20.8 million in 2025, consistently accounting for the vast majority of extra-EU imports. On the export side, the UK absorbed €8.6 million of EU exports in 2015, rising to €11.6 million in 2025 (+35.3%). The UK's share of EU imports is so dominant that a single price shock in 2022 — an anomalous −21.8% drop in UK import prices, with an abnormality score of 8.2 — affected 94.3% of total import value.
2.2 Norway and Switzerland emerged as high-growth export destinations
Beyond the UK, the most dynamic growth in EU exports was concentrated in nearby European economies:
| Export partner | 2015 (EUR) | 2025 (EUR) | Change |
|---|---|---|---|
| Norway | 727,189 | 5,163,844 | +610.1% |
| Switzerland | 3,165,200 | 6,214,573 | +96.3% |
| United States | 1,956,792 | 3,246,255 | +65.9% |
| China | 1,472,731 | 2,896,714 | +96.7% |
| United Arab Emirates | 1,263,227 | 1,797,468 | +42.3% |
Norway's sevenfold increase is particularly noteworthy and may reflect growing Scandinavian demand for lightweight fill materials in infrastructure and green-building applications. Switzerland's near-doubling aligns with its ongoing construction activity and strict energy-efficiency regulations.
2.3 Import concentration rose sharply, driven by the Netherlands
The Herfindahl-Hirschman Index (HHI) for import concentration by volume more than doubled, from 2,847 to 5,912 — a shift from a moderately concentrated market to a highly concentrated one. This is largely driven by the Netherlands, which saw its imports surge from €629,465 in 2015 to €22.2 million in 2025 — a 3,423% increase. Meanwhile, Germany's extra-EU imports collapsed from €22.9 million to just €236,000 (−99.0%). This dramatic rebalancing likely reflects a shift in reporting patterns or logistics hub consolidation, with Rotterdam replacing Hamburg as the primary entry point for expanded clay flows into the EU.
2.4 Import-source volatility is highest for CIS and Nordic partners
The coefficient of variation (CV) of import values reveals wide year-to-year swings for several partners:
| Import partner | CV |
|---|---|
| Russian Federation | 1.45 |
| Ukraine | 1.24 |
| Norway | 1.19 |
| Mexico | 0.87 |
| United States | 0.65 |
Russian and Ukrainian flows are among the most volatile, a pattern that pre-dates and was likely amplified by geopolitical disruptions from 2022 onward. On the export side, Morocco (CV 1.89) and the United Arab Emirates (CV 1.42) showed the highest variability, while Switzerland was remarkably stable (CV 0.11).
3. Production Contraction, Specialisation Patterns, and the Role of Key Member States
3.1 EU production volumes fell while values rose, indicating price inflation
According to PRODCOM data (code 23.99.19.20), EU production of expanded clays and similar expanded mineral materials declined from approximately 2.23 billion kg in the first observed year to 1.60 billion kg in the latest — a 28.3% contraction. Over the same span, production value rose from €232 million to €340 million (+46.3%). This implies that unit production values increased substantially, likely driven by higher energy costs (expanded clay is kiln-fired) and raw-material inflation, rather than by volume growth.
3.2 The Netherlands emerged as the EU's expanded clay trade hub
The Netherlands' transformation is the single most dramatic intra-EU shift. On the export side, Dutch extra-EU exports rose from just over €1 million to €25.5 million (+2,389%), making the Netherlands the bloc's largest exporter of expanded clays by value — overtaking Germany, whose exports fell from €22.5 million to €5.0 million (−77.6%). On the import side, the same pattern holds: the Netherlands now accounts for the bulk of extra-EU imports.
| EU reporter | 2015 exports (EUR) | 2025 exports (EUR) | Change |
|---|---|---|---|
| Netherlands | 1,026,359 | 25,546,126 | +2,389% |
| Germany | 22,472,905 | 5,026,211 | −77.6% |
| Denmark | 3,426,386 | 4,170,987 | +21.7% |
| Belgium | 1,145,273 | 2,309,967 | +101.7% |
3.3 Specialisation is concentrated in smaller member states
Revealed symmetric comparative advantage (RSCA) data for 2025 shows that smaller EU members hold the strongest specialisation in expanded clay production and trade:
| Member state | RSCA | RCA | Prod. share of EU exports |
|---|---|---|---|
| Estonia | 0.91 | 20.89 | 7.1% |
| Denmark | 0.69 | 5.52 | 9.5% |
| Portugal | 0.67 | 4.99 | 6.9% |
| Netherlands | 0.44 | 2.57 | 37.3% |
| Finland | 0.37 | 2.18 | 2.2% |
By contrast, several Central and Eastern European members (Bulgaria, Slovakia, Croatia, Latvia) show near-zero or negative RSCA, indicating negligible expanded clay export specialisation.
3.4 The EU's export propensity more than doubled
Export propensity — the share of EU production destined for extra-EU markets — rose from 8.1% in 2015 to 23.1% in 2025 (+184.2%). Trade intensity (the combined import-and-export share of apparent consumption) also rose from 14.5% to 34.3% (+136.4%). These figures confirm that the EU expanded clay market has become substantially more open and internationally oriented over the decade, even as domestic production volumes contracted.
Conclusion
Over the period 2015–2025, the EU expanded clay market evolved from a near-balanced trade position into a clear net-export surplus, with extra-EU export volumes rising 45% while import volumes fell by 45%. This structural shift was accompanied by a dramatic geographic reorientation: the Netherlands consolidated its role as the dominant trade hub (replacing Germany), while Norway and Switzerland became the fastest-growing export destinations. On the production side, volumes contracted by 28% even as values rose by 46%, reflecting significant cost inflation in an energy-intensive sector.
From a vulnerability perspective, the EU's position has improved markedly — the bloc is no longer dependent on extra-EU supply for expanded clays, and its export base has diversified beyond the United Kingdom. However, import concentration has increased (HHI by volume more than doubled), and certain supply flows — particularly from Russia, Ukraine, and Norway — remain highly volatile. The 2022 UK import price shock, which affected 94% of import value, illustrates the risks of relying on a single dominant partner. Looking ahead, the sector's exposure to energy costs and its sensitivity to construction-cycle dynamics in key export markets (the UK, Switzerland, Norway, and the Gulf states) will remain the principal factors to watch.