The construction chemicals industry opened the week of September 14, 2026, with a clear split between volatile feedstock chains and structural growth markets. Polycarboxylate superplasticizer monomers have climbed to year-to-date highs on tight ethylene oxide supply, China’s cement sector is attempting a broad price recovery, and Saint-Gobain is continuing its construction chemicals expansion into Latin America. At the same time, dry-mix mortar additives and low-carbon concrete admixtures are posting robust demand growth as specifications tighten worldwide.
PCE Monomer Surges to Year High on EO Tightness
Polycarboxylate superplasticizer (PCE) monomer prices in China have moved firmly into “Golden September” territory. As of September 10, East China EPEG transactions reached RMB 10,300-10,500 per metric ton, up RMB 1,500/mt from end-August and RMB 3,400/mt higher year-on-year, according to ChemPriceHub.
The rally is being driven by three factors:
- Ethylene oxide supply tightness: East China EO was quoted at RMB 8,600/mt on September 10, up RMB 900/mt from late August and RMB 2,300/mt above the same period last year. MEG inventories have fallen to near 10-year lows, prompting some co-production units to shift output toward MEG and away from EO.
- Low operating rates: China’s PCE monomer industry was running at just 24.21% capacity utilization as of September 10, down 15.86 percentage points YoY. Weekly output was approximately 27,000 mt, down 37.5% YoY.
- Peak-season restocking: Concrete operating rates rose to 6.43% and shipment volumes reached 1,288,660 cubic meters, up 7.30% month-on-month, as construction activity accelerated after summer weather disruptions.
ChemPriceHub expects PCE monomer prices to remain at elevated levels through late September, with potential for further upside if Middle East tensions keep crude and ethylene markets firm.
China Cement Price Hikes Spread to 18 Provinces
China’s cement producers are attempting a coordinated price recovery. According to Digital Cement Network, 18 provinces and municipalities had announced cement or clinker price increases by September 11, 2026. Key movements include:
- Yunnan: +RMB 100/ton on September 9
- Heilongjiang, Jilin, Liaoning: +RMB 50/ton, with second-round +RMB 50/ton in Jilin and Liaoning
- Inner Mongolia: +RMB 50/ton initially, followed by second-round +RMB 30-50/ton
- Shandong: +RMB 50/ton on September 8
- Shanxi, Hebei: +RMB 30-50/ton
- Sichuan, Chongqing: +RMB 20-50/ton
- Jiangsu, Zhejiang, Shanghai, Anhui: +RMB 10-20/ton in multiple rounds
The national cement price index stood at RMB 322/ton on September 11, up 1.25% day-on-day, according to Mysteel. Coal costs remain elevated, with Qinhuangdao thermal coal at multi-year highs, giving producers a cost-side justification for the hikes. However, real estate investment remains weak, and some regions are seeing resistance from concrete and construction buyers, suggesting that full price transmission is not guaranteed.
Saint-Gobain Expands Construction Chemicals Platform in Latin America
Saint-Gobain is continuing its aggressive construction chemicals expansion. In late August 2026, the company completed the acquisition of QSI Productos para la Construccion (QSI PPC) in Peru, adding to its existing Soquimic platform and brands including Weber and Z Aditivos. The deal strengthens Saint-Gobain’s position in Peruvian infrastructure and mining end markets.
Simultaneously, Saint-Gobain announced a fourth plasterboard production line at its Bahia, Brazil plant, which will become the largest plasterboard production line in South America once completed. The investment follows the inauguration of a third line at the same site in 2024.
These moves fit the company’s broader “Lead & Grow” strategy, which has already seen Saint-Gobain close the Fosroc acquisition and sign the Xypex crystalline waterproofing deal in 2026. Construction chemicals remains the company’s fastest-growing segment, with H1 2026 organic growth of +5.3% and Q2 growth of +8.5%.
Dry-Mix Mortar Additives Market Reaches $26.4 Billion
The global dry-mix mortar additives and chemicals market grew to an estimated USD 26.44 billion in 2026, up 7.7% year-on-year from USD 24.55 billion in 2025, according to The Business Research Company. The market is projected to reach USD 35.16 billion by 2030 at a 7.4% CAGR.
Key growth drivers include:
- Polymer-modified mortars: Contractors are prioritizing durability and reduced application defects, with polymer-modified renders extending facade maintenance cycles from 7 to 12 years according to IIT Delhi research.
- Large-format tile adhesives: These require polymer-rich, sag-resistant formulations with calibrated HPMC grades and high-bonding RDP.
- Waterproofing mortars: Tightening durability standards in markets such as Shenzhen and Guangzhou are accelerating adoption of crystalline and hydrophobic admixtures.
Cellulose ether prices have remained stable in September. Construction-grade HPMC in Shandong was quoted at approximately RMB 12,000/ton for 100,000 mPa.s viscosity, while food-grade material traded near RMB 58,000/ton.
Low-Carbon Concrete Admixtures Move from Lab to Field
The low-carbon concrete transition is producing increasingly field-proven admixture solutions. Two recent trials highlight the trend:
- Material Evolution MevoXL: In a UK Environment Agency trial with RPC Contracts, the MevoXL admixture allowed pulverized fly ash (PFA) content to increase from 14% to 30% in precast concrete blocks, cutting embodied carbon by 20% while increasing strength by 56% versus specification.
- MCi Carbon Pozzlock: In Australia, MCi Carbon’s mineral-carbonation-derived supplementary cementitious material was successfully trialed at Boral’s Maldon Cement Works as a 5% cement replacement, with potential to avoid around 0.5 tonnes of CO2 per tonne of material over its lifecycle.
These results reinforce the growing role of admixtures in enabling higher supplementary cementitious material (SCM) replacement without sacrificing early strength or workability.
Waterproofing Admixtures Maintain Growth Trajectory
Waterproofing admixtures continue to outpace broader construction chemicals growth. Coherent Market Insights estimates the global market at USD 3.2 billion in 2026, reaching USD 5.1 billion by 2033 at a 7.2% CAGR. MarkWide Research sizes the market larger at USD 4.8 billion in 2026, expanding to USD 8.6 billion by 2035.
Crystalline admixtures remain the fastest-growing segment, driven by infrastructure durability mandates and a shift away from membrane-dependent systems. Asia-Pacific leads regional growth, while Europe is pushing ahead with eco-friendly and bio-based formulations.
What This Means for Procurement Teams
September 2026 presents a mixed but directionally clear environment for construction chemical buyers:
- PCE-based admixtures: Expect elevated pricing through at least late September. Lock in supply now if contracts allow.
- Cement and dry-mix additives: Regional price volatility is rising; multi-source sourcing and inventory discipline are critical.
- Low-carbon specifications: Field-validated SCM-boosting admixtures are becoming viable alternatives to traditional high-clinker mixes.
- Waterproofing: Crystalline and hydrophobic admixtures are gaining specification share, particularly in infrastructure and data center projects.
Hosechem supplies high-performance construction chemical additives including HPMC, HEMC, HEC, redispersible polymer powder (RDP), PCE superplasticizers, and crystalline waterproofing admixtures. Our technical team supports dry-mix mortar producers, ready-mix operators, and waterproofing contractors with formulation optimization, regional pricing intelligence, and reliable global supply. Contact Hosechem today to secure your additive requirements for the Golden September construction peak.
