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September 3, 2026 — The construction chemicals industry enters the traditional Golden September peak season under extraordinary cost pressure. A multi-category chemical price hike wave took effect on September 1 across resins, coatings, waterproofing emulsions, and basic feedstocks, driven by geopolitical disruption in the Strait of Hormuz, upstream monomer inflation, and concentrated plant maintenance. Simultaneously, ethylene oxide (EO) and polycarboxylate superplasticizer (PCE) monomer prices have jumped to their highest levels of the cycle, with PCE monomer gaining 5.61 percent in a single trading day. And Sika, the world’s largest pure-play construction chemicals supplier, has closed its acquisition of Turkish adhesives and sealants leader Akkim — the first deal funded from its freshly placed EUR 1 billion hybrid capital bond.

September Price Hike Wave: Resins, Coatings, and Waterproofing Emulsions All Up

Beginning September 1, 2026, a coordinated wave of price increases swept through the global chemical building materials supply chain. The China Council for the Promotion of International Trade (Zhejiang) characterized the move as a “large-scale, multi-category” hike covering resins, coatings, nylon, electronic substrates, solvents, and basic feedstocks, with increases ranging from tens of RMB to over RMB 1,000 per ton and select electronic materials exceeding 20 percent.

The key moves include:

• Allnex (Suzhou): Powder coating resins — indoor, standard weather-resistant, and ultra-weather-resistant grades — uniformly raised RMB 500/ton effective September 1. This is Allnex’s third RMB 500/ton increase in 2026, following January and March rounds, driven by PTA and neopentyl glycol (NPG) feedstock inflation.
• Hengshui Xinguang New Materials: Building coating and waterproofing emulsion products subject to stepped increases: styrene-acrylic (interior/exterior) +RMB 200–300/ton; elastic/stone-like emulsions +RMB 300–400/ton; waterproof, pure acrylic, and silicone-acrylic emulsions +RMB 400–600/ton. The company cited acrylic monomer costs — styrene, butyl acrylate, and MMA — which account for 70–85 percent of total formulation cost.
• BASF: North America caprolactam, nylon 6, and nylon 6/66 copolymer prices raised USD 0.08/lb (approximately RMB 1,197/ton) effective September 1. Simultaneously, European NPG raised EUR 250/ton and North American NPG raised USD 221/ton, equivalent to RMB 1,500–1,700/ton — BASF’s most aggressive hike of the year.
• Sherwin-Williams: Paint Store Group entire product line raised 8 percent, attributed to the Iran-linked Hormuz Strait disruption pushing up raw material and freight costs.
• Wanhua Chemical: Multiple basic chemical ex-works prices raised across North, East, South, and Northeast China: butadiene +RMB 180/ton, styrene +RMB 200/ton, n-butanol +RMB 100/ton, acrylic acid +RMB 200/ton, acrylic butyl ester +RMB 400/ton, and LDPE grades +RMB 50–100/ton.

East China hydrogenated NPG spot prices have climbed to RMB 9,200–9,400/ton, up more than RMB 1,000/ton from early August levels of RMB 8,300/ton. Cyclohexanone in Shandong traded at RMB 9,300–9,400/ton, up RMB 250/ton in a single day. The cumulative signal for construction chemical formulators is clear: downstream waterproofing emulsions, acrylic-based coatings, and resin-bonded repair systems will see 5–15 percent cost resets through September and October.

EO Hits RMB 8,000/t, PCE Monomer Surges 5.61 Percent in One Day

For polycarboxylate superplasticizer (PCE) producers and buyers, the week opened with a dramatic move. On September 2, 2026, Satellite Chemical (002648.SZ) raised its ethylene oxide (EO) ex-works quote to RMB 8,000/ton, up RMB 200/ton in a single trading day. SunSirs data shows EO at RMB 7,600/ton on September 1, already up 11.76 percent over the preceding 60 days.

The EO rally transmitted immediately downstream:

• PCE monomer: SCI99 weekly data (week ending August 27) showed East China HPEG/TPEG at RMB 8,900–9,100/ton (+2.86 percent week-over-week) and EPEG at RMB 8,900–9,150/ton. By September 1, Mysteel assessed East China HPEG at RMB 9,000–9,250/ton and TPEG at RMB 9,000–9,250/ton, both up RMB 250/ton from the prior session.
• Baichuan Yingfu (September 2): The PCE monomer market average price surged to RMB 9,531/ton, up RMB 506/ton or 5.61 percent in a single day. East China HPEG was quoted at RMB 9,300–9,850/ton and TPEG at RMB 9,400–9,900/ton. Multiple manufacturers reported zero sellable inventory — spot supply was described as “extremely difficult to find.”
• Non-ionic surfactant (AEO-9): RMB 13,100–13,300/ton (+1.54 percent WoW); ethylene glycol butyl ether RMB 10,700–10,900/ton (+1.89 percent); diethanolamine flat at RMB 8,000–8,200/ton.

Supply-side fundamentals remain tight. SCI99 assessed EO industry operating load at 51.21 percent (down 0.61 percentage points week-over-week) as co-production units diverted output to higher-margin monoethylene glycol (MEG). PCE monomer capacity utilization stood at just 24.04 percent (down 0.36 percentage points), with Wanhua restarting after a brief shutdown while Sanjiang reduced output further. Non-ionic surfactant operating rates ticked up to 50.68 percent.

The outlook from SCI99 is direct: downstream acceptance of high-priced monomer remains weak, with buyers locked into strict need-based procurement. Some small and mid-sized factories are cutting output or idling. But with spot supply still tight and September cargoes already pre-sold, PCE monomer producers are expected to maintain firm offer prices through the month. For concrete admixture formulators, this means liquid PCE quotes will reset higher through September as monomer producers pass through the EO rally.

Sika Closes Akkim Acquisition, Extending Adhesives and Sealants Platform

On September 3, 2026, Sika announced the closing of its acquisition of Akkim, a leading global manufacturer of adhesives and sealants headquartered in Turkey. The deal further strengthens Sika’s position in the adhesives and sealants industry and creates growth opportunities through expanded distribution, enhanced manufacturing capacity, and broader geographic reach.

The Akkim closing is the first transaction from Sika’s newly strengthened balance sheet. On August 19, 2026, Sika successfully placed an inaugural EUR 1 billion hybrid capital bond — split into two EUR 500 million tranches of fixed-rate resettable subordinated debt — placed into the European institutional fixed income investor base with Citigroup as Global Coordinator and BofA Securities, Citigroup, and UBS Investment Bank as active bookrunners. The bonds are listed on the regulated market of Euronext Dublin.

The hybrid bond and Akkim deal follow Sika’s strong H1 2026 results reported on July 28: group sales of CHF 5.59 billion (+4.0 percent in local currencies, -1.5 percent in CHF due to a 5.5 percent negative currency effect), organic growth of 2.9 percent, EBITDA of CHF 1.06 billion at a 19.0 percent margin (up 10 basis points year-over-year), and net profit of CHF 552.1 million. Sika upgraded its full-year 2026 guidance to 3–6 percent local-currency sales growth with an EBITDA margin of 19.0–19.5 percent, and reaffirmed its Strategy 2028 medium-term targets.

For the construction chemicals competitive landscape, the Akkim deal continues the consolidation thesis: Sika, Saint-Gobain (with Fosroc/Chryso/GCP/Xypex), BASF (redeploying capital from coatings divestment into core chemistry), and MAPEI are pulling away from the mid-tier. The EUR 1 billion war chest signals more bolt-on acquisitions in waterproofing, dry-mix technology, and concrete admixtures through Q4 2026.

Jiangsu Golden September: Cement Tries to Rise, Fly Ash Leads the Way

As September opened, Jiangsu and the broader Yangtze River Delta construction materials market formally entered the “Golden September” peak season window. According to BaiNian JianZhu (Century Construction Network) on September 2, the post-heat-wave recovery is underway, with concrete mixing plant operating rates picking up and outdoor construction efficiency visibly improved.

Cement: Yangtze River Delta major clinker producers plan approximately 15 days of peak-shutting kiln maintenance in September to relieve inventory pressure. Four regions — Jiangsu, Zhejiang, Anhui, and Shanghai — plan two rounds of price hikes: RMB 20/ton on September 2 and RMB 30/ton in mid-to-late September, targeting a cumulative RMB 50/ton increase. However, as of early September the hikes had not yet landed, blocked by disagreement among top producers. The resistance is structural: January–August Yangtze River Delta cement outflow fell 13.8 percent year-over-year, 60 percent of the industry is operating at a loss, and July Jiangsu cement output fell 16.39 percent year-over-year. Current P.O42.5 bulk cement in the Yangtze River Delta averages just RMB 218.13/ton — a year low — with Nanjing ex-works at RMB 170–180/ton, below most producers’ cost lines.

Fly ash: The most active product in early September. Jiangsu riverside power plants raised all grades by RMB 10/ton from September 1, with Hangzhou up RMB 5–10/ton and Jiaxing up RMB 5/ton. The logic is supply-side: summer peak demand is ending, thermal units are reducing output, and maintenance season is approaching — Huaneng Jinling #1 unit A-maintenance starts September 15, and SPIC Yancheng #2 unit B-maintenance starts September 24. On the demand side, key infrastructure projects including the Salt-Yixing High-Speed Railway, Ning-Huai intercity railway, and Tong-Su-Jia-Yong railway maintain rigid demand for quality Grade I and II fly ash. For concrete producers and SCM formulators, the fly ash rally signals tighter supplementary cementitious material supply through Q4 2026.

Waterproofing Chemicals: Market Forecasts Converge on Sustained Growth

Multiple research houses released updated waterproofing chemicals forecasts in recent weeks, and despite differences in methodology, all point to sustained expansion driven by urbanization, climate resilience, and tightening building codes.

• Research and Markets: Global waterproofing chemical market projected at USD 7.62 billion in 2026, growing at a 6.14 percent CAGR to USD 10.93 billion by 2032.
• Value Market Research: Market valued at USD 39.09 billion in 2025, projected to reach USD 42.73 billion in 2026 and USD 87.10 billion by 2034 at a 9.31 percent CAGR. Asia-Pacific held 46.88 percent share in 2025; bitumen-based products led at 55.61 percent share; preformed membrane systems captured 53.29 percent.
• Persistence Market Research (waterproofing solution): Market valued at USD 30.5 billion in 2026, projected to reach USD 44.5 billion by 2033 at a 5.6 percent CAGR. The chemicals segment holds approximately 55 percent share, and water-based formulations are the fastest-growing sub-segment driven by low-VOC regulations and green building certification.
• Persistence Market Research (waterproofing chemicals): Market at USD 45.2 billion in 2026, projected to USD 105.7 billion by 2033 at a 12.9 percent CAGR. EPDM membranes are the fastest-growing product type at 14 percent CAGR, driven by 50-plus year service life and compatibility with green roofing.

The World Bank estimates that over USD 94 trillion in infrastructure investment is required globally through 2040, and the UN projects 68 percent of the world’s population will live in urban areas by 2050 — both directly translating into sustained demand for waterproofing across foundations, roofs, tunnels, and basements. The EU’s Renovation Wave Strategy targets retrofitting 35 million buildings by 2030, with building envelope waterproofing as a core element. In the Middle East, Saudi Vision 2030 giga-projects are creating unprecedented demand for heat-resistant, UV-stable, and saline-resistant waterproofing systems.

The competitive landscape is also consolidating here. Saint-Gobain’s July 13, 2026 definitive agreement to acquire Xypex Chemical Corp. — the Canadian crystalline waterproofing leader operating in over 100 countries with approximately 170 employees and projected 2026 sales of CAD 110 million — adds Admix C-Series, Concentrate, and Bio-San technology to Saint-Gobain’s existing GCP Preprufe, Fosroc Proofex, Stirling Lloyd Eliminator, and GCP Silcor portfolio. The transaction is expected to close in Q4 2026.

What It Means for Buyers and Formulators

The convergence of these threads — the September price hike wave, the EO and PCE monomer surge, Sika’s acquisition momentum, and the Yangtze River Delta’s tentative cement recovery — describes an industry entering Golden September with cost-side pressure at the forefront. For procurement and formulation teams, the actionable takeaways are:

• Lock in PCE monomer and liquid PCE contracts now. With capacity utilization at 24 percent, zero sellable inventory at multiple producers, and EO at RMB 8,000/ton, spot prices will continue to firm through September. Buyers on short-cycle contracts are most exposed.
• Expect 5–15 percent cost resets on waterproofing emulsions and acrylic-based coatings. Acrylic butyl ester alone is up RMB 400/ton, and feedstock costs represent 70–85 percent of emulsion formulation cost. Formulators should review pricing models and communicate adjustments to customers.
• Watch fly ash and SCM supply. Thermal unit maintenance from mid-September will tighten quality fly ash supply, and the Yangtze River Delta cement market’s attempted RMB 50/ton cumulative hike — even if partially absorbed — will lift concrete input costs.
• Monitor the consolidation pipeline. Sika’s EUR 1 billion war chest and Saint-Gobain’s Xypex acquisition signal more deal-making in waterproofing, admixtures, and dry-mix technology through Q4 2026, potentially tightening regional supply and pricing discipline.

For formulators working with LC3 and low-clinker cement systems, the September market adds a cost dimension to an already complex technical picture. Calcined clay cement can reduce carbon intensity by up to 40 percent and cost up to 25 percent less to produce, but superplasticizer demand increases 1.5–3.6 times — meaning the PCE monomer rally directly impacts the economics of low-carbon concrete. With 46 percent of US cement going to public construction and the GSA’s IRA low-embodied-carbon requirements now mandating Type III EPDs and GWP limits by strength class, the specification shift toward LC3-compatible admixture systems is creating parallel demand for phosphonate-anchored PCE formulations, nano-silica rheology modifiers, and crystalline waterproofing admixtures that work synergistically with supplementary cementitious materials.

About Hosechem

Hosechem supplies high-performance construction chemical additives — including HPMC, HEMC, HEC, RDP, PCE superplasticizers, and crystalline waterproofing admixtures — to dry-mix mortar producers, ready-mix operators, and waterproofing contractors worldwide. For technical data sheets, formulation support, or regional price inquiries, visit hosechem.com or contact our team directly.