Polystyrene is one of the most commonly used plastics in the world. It is widely used in packaging materials, disposable food containers, insulation products, consumer goods, electronics, and household appliances. Because it is lightweight, affordable, and easy to mold, many industries depend on it. As a result, changes in Polystyrene Prices can directly impact manufacturers, distributors, and end users across the globe.

In the third quarter (Q3) of 2025, the global Polystyrene price trend moved steadily downward across most major regions. Prices declined consistently due to weaker demand from downstream industries such as packaging, consumer goods, electronics, and automotive. The overall market mood remained cautious, mainly because of economic uncertainty and slower industrial activity.

Let’s take a closer look at how the market performed globally and region by region during Q3 2025.

Global Market Overview

During Q3 2025, the global polystyrene market faced continuous pressure. Demand from packaging and consumer goods sectors slowed down in many countries. These industries are key users of polystyrene, and when they reduce production, it directly affects overall consumption.

At the same time, supply levels remained stable in most regions. There were no major production disruptions, and producers continued operating at regular rates. When supply stays steady but demand weakens, prices usually decline. This imbalance between supply and demand was one of the main reasons behind the downward Polystyrene price trend during the quarter.

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Another important factor was the drop in feedstock Styrene Monomer prices. Since styrene is the main raw material used to produce polystyrene, lower feedstock costs reduced production expenses. This reduced cost support for sellers and allowed prices to fall further.

Freight costs and global economic instability also played a role. Many buyers delayed purchases due to uncertainty. Instead of placing large orders, companies focused on reducing inventory and managing costs carefully.

United States: Weak Export Demand

In the United States, polystyrene export prices (FOB Houston, GPPS grade) ranged between USD 1470–1490 during Q3 2025. Prices followed a downward trend throughout the quarter.

The decline was mainly driven by weak demand from packaging, construction, and consumer appliance industries. Export demand from Latin America also slowed, as buyers in that region postponed procurement due to bearish market sentiment.

In September 2025 alone, Polystyrene Prices in the US fell by 2.3%. A major reason was the continued drop in Styrene Monomer feedstock prices, which lowered production costs. Distributors and converters focused on clearing existing inventories instead of buying new material. As a result, spot buying activity remained limited.

Overall, the US market showed consistent softness, reflecting both domestic and global demand weakness.

Mexico: Following the US Trend

In Mexico, imported polystyrene prices (CIF Manzanillo from the US) also declined in Q3 2025. The price movement closely followed the US market.

Demand from packaging and consumer goods sectors remained weak. Importers were cautious and placed fewer new orders. Since US export prices were lower, Mexican import prices also softened.

In September 2025, Polystyrene Prices in Mexico declined by 2.2%. Buyers preferred to reduce inventory instead of restocking, which kept purchasing activity slow. Stable supply but limited demand continued to pressure the market.

Brazil: Downward Movement Continues

Brazil experienced a 2.1% decline in polystyrene export prices (FOB Santos) during Q3 2025. Weak domestic demand from packaging and consumer goods sectors was the main reason.

Limited export opportunities and slower global demand added further pressure. In September 2025, prices in Brazil declined by 2.3%, following lower US export offers and weaker feedstock costs.

Brazilian buyers remained cautious and focused on smaller purchase volumes. The overall Polystyrene price trend in Brazil mirrored the broader global slowdown.

Europe: Sharp Declines Across Major Countries

Europe experienced some of the most significant price drops during Q3 2025.

In Belgium (FD Antwerp), prices declined sharply by 7.61%. Germany (FD Hamburg) saw a 7.13% drop, and the Netherlands (FD Amsterdam) experienced a 7.5% decline. France also followed a similar downward path.

The main reasons were weak demand from packaging, automotive, and insulation sectors, combined with economic uncertainty in the Eurozone. Consumer confidence remained low, and industrial activity slowed down.

In September 2025, prices continued to fall:

• Belgium dropped by 3.4%

• Germany declined by 3.2%

• Netherlands decreased by 3.3%

Lower Styrene Monomer costs across Europe reduced cost support for producers, making it easier for prices to fall further. Buyers avoided large purchases, and seasonal restocking did not occur as expected.

Overall, the European market showed one of the most pronounced downward trends globally.

Saudi Arabia: Mild Decline

In Saudi Arabia, polystyrene prices (FD Jeddah) declined by 2.6% during Q3 2025. The drop was milder compared to Europe or Asia.

Demand from packaging sectors slowed, but supply remained balanced. Feedstock Styrene Monomer costs also eased slightly due to lower crude oil and naphtha values.

In September 2025, prices declined by 0.7%. Although the market softened, the impact was not as severe as in Europe. The region maintained relatively stable fundamentals despite global pressure.

South Korea: Export Pressure

South Korea saw a 3.7% decline in polystyrene export prices (FOB Busan) during Q3 2025. Weak demand from packaging and electronics sectors played a major role.

Procurement activity remained low, and export competition increased. In September 2025, prices declined further by 1.6%.

Lower feedstock costs and cautious buying behavior kept the market under pressure. Overall, South Korea reflected broader Asian market challenges.

India: Significant Domestic Weakness

India experienced a 6.2% decline in polystyrene prices (Ex-Mumbai) during Q3 2025. Slower demand from packaging and household goods sectors limited purchasing activity.

Economic challenges and reduced consumer spending also contributed to the downward trend. In September 2025, prices declined by 1.0%.

Competitive imports from South Korea and the Middle East increased supply pressure. Domestic producers offered discounts to maintain sales.

China: Continued Softness

China’s polystyrene export prices (Ex-Qingdao) declined by 3.9% in Q3 2025. Weak demand from packaging and electronics sectors kept procurement activity low.

Oversupply and stable production levels created additional pressure. In September 2025, prices fell by 1.2% due to weak domestic consumption and competitive offers.

Lower Styrene Monomer costs further reduced price support for producers.

Key Factors Behind the Downward Trend

The global Polystyrene price trend in Q3 2025 was influenced by:

• Weak demand from packaging, consumer goods, and electronics sectors

• Global economic slowdown

• Stable but sufficient supply levels

• Lower Styrene Monomer feedstock costs

• Limited restocking activity

• Cautious buyer behavior

When demand weakens but supply remains steady, prices naturally decline. This basic market principle shaped the entire quarter.

Conclusion

In simple terms, Q3 2025 was a challenging quarter for the global polystyrene market. Most regions experienced consistent price declines due to weaker demand and economic uncertainty. Europe saw the sharpest drops, while the US, Asia, and Latin America also recorded steady downward movements.

Lower feedstock costs and cautious procurement behavior further supported the decline in Polystyrene Prices. Unless demand from packaging and consumer goods sectors improves significantly, the market may continue to face pressure in the near term.

Understanding these trends helps businesses plan better, manage inventory wisely, and make informed purchasing decisions in a changing market environment.