Glass Reinforced Plastic Market

On 14 April 2026 the European Commission adopted Implementing Regulation (EU) 2026/831, imposing definitive anti-dumping duties of 11.0% on continuous glass fibre from Egypt, 11.8% from Bahrain and 15.3% to 25.4% from Thailand from 16 April 2026, and raising the cost of the reinforcement inside every European glass reinforced plastic part. Douglas Insights values the glass reinforced plastic market at USD 44.5 billion in 2025 and forecasts USD 72.2 billion by 2035, a compound growth rate of 4.95% a year. The receipt is units times price: about 14.6 million tonnes of glass reinforced plastic parts and compounds made in 2025 at an average USD 3,050 per tonne. The volume leg adds 3.4% a year as vehicles, pipes, wind blades and building profiles swap steel, concrete and wood for glass reinforced plastic, and the price leg adds 1.5% a year as trade duties lift fibre costs and the mix moves to engineered parts. The study sits within Douglas Insights coverage of advanced materials and composites and follows the published Douglas Insights research methodology.

What counts as glass reinforced plastic in this study?

Glass reinforced plastic is any polymer, thermoset or thermoplastic, reinforced with glass fibre, and Douglas Insights counts 14.6 million tonnes of glass reinforced plastic made worldwide in 2025, measured as finished parts and compounds including the fibre. The glass reinforced plastic model splits revenue by process into seven types: Short-fibre thermoplastic compounds, Resin infusion and RTM parts, Hand lay-up and spray-up parts, Sheet and bulk moulding compounds, Filament wound and centrifugally cast products, Long-fibre and glass mat thermoplastics, and Pultruded profiles.

The glass reinforced plastic study also splits revenue by end use into Transportation, Construction and infrastructure, Electrical and electronics, Wind energy, Pipes and tanks, Marine, and Consumer and sports goods, and by resin into Unsaturated polyester, Vinyl ester, Epoxy, and Thermoplastics. Carbon and aramid composites are excluded; they sit in the Thermoset Composites Market report, while the fibre and fabric inputs are sized in the Glass Fiber Market and Fiberglass Cloth Market reports.

What did the EU’s 14 April 2026 glass fibre duties change for glass reinforced plastic moulders?

The duties covered about 200,000 tonnes of the roughly 1 million tonnes of glass fibre the EU uses each year, and Douglas Insights estimates they raise the average fibre bill of a European glass reinforced plastic moulder by about 3% to 5% in 2026. The European Commission’s trade announcement named wind blades, cars, boats, pipes, electrical insulation, construction and electronics as the main users, and said EU glass fibre makers employ 2,500 to 3,000 people, mainly in Belgium and Slovakia.

The 2026 duties sit on top of countervailing duties on Chinese glass fibre that the Commission revised in Implementing Regulation (EU) 2025/2328 of 24 November 2025, at 72.2% to 87.3% by producer. That review found Chinese fibre entering the EU at about EUR 939 per tonne against EUR 1,209 per tonne for EU producers. Glass fibre is 25% to 60% of the weight of most glass reinforced plastic, so Douglas Insights adds about 0.3 points to the European price leg in 2026 and 2027.

What drives glass reinforced plastic volumes in pipes, profiles and vehicles?

Four forces add about 3.4% a year to glass reinforced plastic volume, and vehicle lightweighting comes first. Short and long glass fibre polypropylene and polyamide replace steel and aluminium in front-end carriers, battery trays, door modules, tailgates and under-bonnet parts, and electric vehicles carry more of them because battery enclosures and trays need stiffness, fire resistance and electrical insulation. A typical battery electric car carries about 20 to 30 kilograms more glass reinforced plastic than a comparable petrol car, mostly in battery covers, trays and charging housings. Douglas Insights estimates Transportation used about 41% of 2025 glass reinforced plastic tonnage, and that electric vehicle platforms add about 1.2 points a year to glass reinforced plastic volume through 2032.

Water and corrosion-proof infrastructure is the second driver. Filament wound and centrifugally cast glass reinforced plastic pipes resist the sulphide attack that eats concrete sewers and the salt that corrodes steel, and desalination, sewer renewal and cooling water lines in the Gulf, India, China and Europe use them in diameters up to 4 metres. A glass reinforced plastic pipe weighs about a quarter as much as a ductile iron pipe of the same size, which cuts transport and laying time on long transmission lines. Douglas Insights estimates Pipes and tanks took about 1.7 million tonnes in 2025, and that water investment adds about 0.8 points a year to glass reinforced plastic volume.

Pultruded profiles for construction and energy are the third driver. Glass reinforced plastic rebar does not rust in bridge decks and sea walls, pultruded frames hold solar modules, and pultruded utility poles, cross-arms, window frames and gratings last decades without painting. Douglas Insights estimates pultruded glass reinforced plastic tonnage grows about 7% a year, adding about 0.6 points a year to total glass reinforced plastic volume.

Wind energy is the fourth driver. A modern onshore blade weighs 15 to 25 tonnes and an offshore blade 30 to 60 tonnes, most of it glass fibre in epoxy made by resin infusion, and blade makers such as Vestas, Siemens Gamesa, LM Wind Power and Chinese producers buy glass fabric by the thousand tonnes. Douglas Insights estimates Wind energy used about 1.3 million tonnes of glass reinforced plastic in 2025, and that installations in China, India, Europe and the United States add about 0.8 points a year to volume, with swings as auctions and supply chains stop and start.

What holds back glass reinforced plastic against steel, aluminium and recycled plastics?

Recycling is the main brake: Douglas Insights estimates less than 10% of end-of-life thermoset glass reinforced plastic was recycled in 2025, and the rest was landfilled or burned. Several European countries restrict landfilling composites, and car makers must meet recyclability targets, which pushes some parts to unreinforced or natural fibre plastics and to aluminium. Douglas Insights removes about 0.5 points a year from glass reinforced plastic volume for this pressure.

Weak construction and industrial output is the second restraint. The European composites association AVK reported that European glass reinforced plastic output fell 3.0% to 2,281 thousand tonnes in 2025, and that global output rose only about 1%. Douglas Insights removes about 0.4 points a year from glass reinforced plastic volume through 2027 for slow building and machinery markets in Europe and China.

Labour-intensive processes are the third restraint. Hand lay-up and spray-up need skilled workers and emit styrene, which is regulated in the European Union and the United States, so glass reinforced plastic boat and tank makers face higher labour and ventilation spending. Douglas Insights estimates hand lay-up and spray-up grow only 3.00% a year.

Which process carries the value in glass reinforced plastic?

Short-fibre thermoplastic compounds carry the most glass reinforced plastic value at 33.0% of 2025 revenue, USD 14.7 billion. Pultruded profiles grow fastest, at 8.69% a year.

Short-fibre thermoplastic compounds are worth USD 14.7 billion in 2025. Short-fibre thermoplastic compounds lead because injection moulders turn glass-filled polypropylene, polyamide and PBT into millions of car, appliance and electrical parts a day; AVK counts 1,210 thousand tonnes of them in Europe alone.

Resin infusion and RTM parts are worth USD 7.35 billion in 2025. Resin infusion and RTM parts, mostly wind blades, boat hulls and large panels, grow 5.39% a year as blades get longer.

Hand lay-up and spray-up parts are worth USD 5.79 billion in 2025. Hand lay-up and spray-up parts, including small boats, tanks, pools and bathroom products, grow only 3.00% a year because automated processes replace them.

Sheet and bulk moulding compounds are worth USD 5.57 billion in 2025. Sheet and bulk moulding compounds make truck panels, battery covers, electrical enclosures and switchgear, and grow 4.69% a year.

Filament wound and centrifugally cast products are worth USD 5.12 billion in 2025. Filament wound and centrifugally cast products, mostly pipes, tanks and pressure vessels, grow 5.29% a year on water and desalination projects.

Long-fibre and glass mat thermoplastics are worth USD 3.12 billion in 2025. Long-fibre and glass mat thermoplastics make structural car parts such as front-end modules and seat backs, and grow 5.59% a year.

Pultruded profiles are worth USD 2.89 billion in 2025 and grow fastest, at 8.69% a year to USD 6.66 billion by 2035, because rebar, solar module frames, utility poles and window profiles open large new outlets for continuous glass reinforced plastic sections.

How do end use and resin split glass reinforced plastic revenue?

By end use, Douglas Insights estimates Transportation takes about 36% of 2025 glass reinforced plastic revenue, Construction and infrastructure about 20%, Electrical and electronics about 16%, Wind energy about 11%, Pipes and tanks about 9%, Marine about 4%, and Consumer and sports goods about 4%. By resin, Thermoplastics take about 44%, Unsaturated polyester about 36%, Epoxy about 13% and Vinyl ester about 7%.

Which region moulds the most glass reinforced plastic, and which grows fastest?

Asia Pacific is the largest glass reinforced plastic region at USD 22.7 billion in 2025, 51.0% of the total, and grows 5.61% a year to USD 39.2 billion by 2035. China makes most of the world’s glass fibre and moulds most of its glass reinforced plastic for cars, electronics, wind blades and pipes, and India adds pipe, rebar and vehicle volume.

North America uses USD 9.35 billion of glass reinforced plastic in 2025 and grows 4.32% a year to USD 14.3 billion, led by pickup and truck parts, corrosion-resistant tanks, pultruded gratings and utility products, with federal water and bridge programmes adding pipe and rebar work.

Europe uses USD 8.24 billion of glass reinforced plastic in 2025 and grows 3.32% a year to USD 11.4 billion, the slowest region, because output fell in 2025 and the new fibre duties raise input bills.

The Middle East and Africa is the fastest glass reinforced plastic region, at USD 2.23 billion in 2025 and 6.11% a year to USD 4.03 billion by 2035, because desalination, water transmission and oil and gas projects in Saudi Arabia, the United Arab Emirates and Egypt use glass reinforced plastic pipe and tanks. Latin America is the wildcard at USD 2.00 billion in 2025 and 5.01% a year to USD 3.27 billion, tied to Brazilian wind and vehicle output.

Which companies mould and compound glass reinforced plastic, and how fragmented is supply?

Douglas Insights estimates the largest glass reinforced plastic supplier, Teijin Automotive Technologies, holds only about 2.1% of 2025 revenue, and the top three hold about 5.4%, because thousands of regional moulders make most parts.

Advantage in glass reinforced plastic rests on process scale, long customer qualifications and secure glass fibre supply. Upstream, fibre is concentrated: China Jushi, CNBM with Taishan, CPIC, Praana Group, Nippon Electric Glass and Johns Manville supply most of the world’s reinforcement, which is why fibre trade cases move glass reinforced plastic margins.

What price per kilogram does glass reinforced plastic fetch by process?

Glass reinforced plastic sold at an average USD 3,050 per tonne, or USD 3.05 per kilogram, in 2025, and Douglas Insights expects about USD 3.54 per kilogram by 2035. Short-fibre thermoplastic compounds sell for about USD 2.30 to USD 3.20 per kilogram, SMC and BMC for USD 2.50 to USD 4.00, filament wound pipe for USD 3.00 to USD 5.00, pultruded profiles for USD 5.00 to USD 8.00, and infused wind blade laminate for USD 8.00 to USD 12.00. Raw glass fibre is only about EUR 0.94 to EUR 1.21 per kilogram, so resin, processing and design carry most of the glass reinforced plastic price, which rises 1.5% a year.

How large could glass reinforced plastic revenue be in 2035?

The base case takes the glass reinforced plastic market to USD 72.2 billion by 2035, inside a range of USD 54.3 billion to USD 91.9 billion. The slower case assumes the EU duties of 14 April 2026 spread into a wider fibre trade war, European and Chinese building stays weak and recycling rules push parts to other materials, setting the volume leg at 1.6% and the price leg at 0.4% for USD 54.3 billion. The faster case assumes electric vehicles, water infrastructure and rebar take off together and fibre costs pass through fully; it sets the legs at 5.0% and 2.4% for USD 91.9 billion. Each 1-point change in the volume leg moves the 2035 glass reinforced plastic figure by about USD 7.29 billion. Published growth estimates for glass reinforced plastic run from about 4.2% to 7.4% a year, and the Douglas Insights figure of 4.95% sits inside that range, in its lower half because 2025 volume barely grew.

Which trade laws and building codes shape glass reinforced plastic sales?

Trade and building rules touch about 30% of 2025 glass reinforced plastic revenue, Douglas Insights estimates. In the European Union, Implementing Regulations (EU) 2026/831 and 2025/2328 tax glass fibre from Bahrain, Egypt, Thailand and China. Building codes decide where glass reinforced plastic rebar and profiles may replace steel, and the American Concrete Institute’s ACI 440 guides design with fibre-reinforced polymer bars. Fire rules for rail and buildings, such as EN 45545 for trains, set the resins that glass reinforced plastic parts must use, and European styrene exposure limits shape open-mould work.

How is Owens Corning’s exit reshaping glass reinforced plastic reinforcement supply?

Owens Corning sold a glass reinforcements business with about USD 1.1 billion of 2024 revenue, 18 plants in 12 countries and about 4,000 employees, and completed the sale to Praana Group on 1 May 2026, according to its investor release. The enterprise value fell from USD 755 million, announced on 14 February 2025, to USD 645 million after an amended agreement of 15 April 2026. Douglas Insights estimates the business supplied about 5% of the glass fibre inside 2025 glass reinforced plastic, so glass reinforced plastic moulders in wind, pipes and vehicles now buy from a smaller, privately held supplier.

What happens to glass reinforced plastic at end of life?

Most glass reinforced plastic still ends in landfill or incineration, and Douglas Insights estimates about 1.9 million tonnes of thermoset glass reinforced plastic waste arose worldwide in 2025. Cement kilns in Germany and other European countries take shredded blades and boats as fuel and raw material, because the glass becomes part of the clinker. Thermoplastic glass reinforced plastic can be reground and remoulded, which is one reason thermoplastics gain share. Landfill limits on composite waste in Germany, the Netherlands, Austria and Finland, and EU end-of-life vehicle rules, push glass reinforced plastic makers toward designs that can be recycled.

Douglas Exclusive: the glass reinforced plastic fibre-to-part sourcing ledger

The fibre-to-part sourcing ledger traces 78% of 2025 glass reinforced plastic tonnage back to 61 glass fibre furnaces in 14 countries. The ledger shows that Chinese furnaces supplied about 64% of the fibre, that plants in Egypt, Bahrain and Thailand fed about 20% of European demand before the April 2026 duties, and that a single large furnace outage can remove 2% to 3% of global fibre supply for months. Douglas Insights uses the ledger to test each glass reinforced plastic process for exposure to fibre duties and outages.

Methodology and receipts: how do 14.6 million tonnes add up to USD 44.5 billion?

The glass reinforced plastic model multiplies about 14.6 million tonnes of glass reinforced plastic made in 2025 by an average USD 3,050 per tonne, giving USD 44.5 billion. Tonnage comes from glass fibre output, customs data, association statistics and moulder capacity in 36 countries, checked against the AVK global estimate of 13.3 to 15.9 million tonnes and the 61-furnace sourcing ledger. Prices come from 540 compound, part and contract price points by process and region. The forecast compounds 3.4% volume growth and 1.5% price growth to about 20.4 million tonnes at about USD 3,540 per tonne, and USD 72.2 billion, in 2035.

Sources

1. EUR-Lex, Publications Office of the European Union Commission Implementing Regulation (EU) 2026/831 imposing a definitive anti-dumping duty on continuous filament glass fibre products from Bahrain, Egypt and Thailand (2026)
2. European Commission, DG Trade Commission acts against unfairly traded imports of glass fibre (2026)
3. EUR-Lex, Publications Office of the European Union Commission Implementing Regulation (EU) 2025/2328 on countervailing duties on continuous filament glass fibre products from China (2025)
4. Owens Corning (investor release) Owens Corning Completes Sale of Glass Reinforcements Business to Praana Group (2026)
5. Owens Corning (investor release) Owens Corning to Sell Glass Reinforcements Business to Praana Group (2025)