Producer
Covestro AG
German specialty polymer and coating company (XETRA: 1COV), spun out of Bayer AG in 2015. Became the dominant global fiber optic coating supplier when it acquired DSM's Resins & Functional Materials business for €1.61B (announced Sep 2020, closed April 1, 2021) — absorbing DSM's 40-year legacy in optical fiber coatings. Then acquired JSR Corporation's 30% stake in Japan Fine Coatings Co., Ltd. (Tsukuba) in January 2022, becoming sole owner. Now self-states it "produces more than 50% of the world's optical fiber coatings." Brands: DeSolite® (primary/secondary UV-cure acrylate coatings), Cablelite® (ribbon matrix/inks), Bufferlite® (tight buffer). Key production sites: Elgin, Illinois USA (former DSM Desotech; main global volume plant); Tsukuba, Japan (Japan Fine Coatings, 100% owned, ~65 staff); Zwolle, Netherlands (coating resins). Also a leading polycarbonate and polyurethane supplier for automotive, electronics, and construction — fiber optic coatings are a small but strategically critical business unit.
5
Inputs supplied
3
Goods downstream
4
Facilities
0
Stories
What they make
5 inputs Covestro AG supplies
Click an input to see every good that depends on it, every country that produces it, and every other company in the supply chain.
chemical
UV-Curable Acrylate Fiber Coating →
chemical
MDI Polyurethane Foam (Reefer Insulation) →
chemical
MDI (pMDI) binder resin for OSB →
chemical
UV-Curable Acrylate Fiber Coating →
chemical
UV-Curable Acrylate Fiber Coating →
Where it shows up
Goods downstream
Essential goods that depend on something Covestro AG makes, pick one to see the full supply chain.
Where they make it
4 facilities
Covestro (fmr. DSM Desotech) – Elgin, Illinois →
USIllinois
Located at 1122 St. Charles Street, Elgin, IL — the former DSM Desotech facility, operational since ~1982 when DeSoto Corporation founded DeSolite brand. Acquired by DSM in 1986, then passed to Covestro via the €1.61B DSM RFM acquisition (April 2021). Produces DeSolite® UV-curable acrylate fiber optic coatings (primary, secondary, matrix, recoating grades). This is the primary global production volume facility for the DeSolite brand — processes acrylates, polyols, isocyanates, monomers, and photoinitiators. Estimated ~30% of global fiber optic coating supply from this single plant in suburban Chicago.
Covestro Baytown TX MDI Plant →
USTexas · manufacturing
US MDI (Desmodur) production; serves North American OSB and polyurethane markets; integrated with Covestro global MDI production network.
Covestro Coating Resins – Zwolle, Netherlands →
NLOverijssel
Covestro's Dutch coating resins production site (Covestro Coating Resins B.V.), inherited from the DSM RFM acquisition. Produces coating resin intermediates and formulated products. The former DSM Functional Materials research/production HQ in the Netherlands. Smaller role in direct fiber optic coating volume compared to Elgin (US) and Tsukuba (Japan); more significant for waterborne and industrial coating resin segments. Netherlands country share of global fiber optic coating supply (~5-8%) is primarily attributable to this Zwolle facility.
Japan Fine Coatings Co., Ltd. – Tsukuba, Ibaraki (Japan) →
JPIbaraki Prefecture
Japan Fine Coatings Co., Ltd. — originally a JV between DeSoto Corporation (US) and JSR Corporation (Japan), founded ~1982. In 2001, DSM Desotech and JSR invested $35M to expand the facility. 100% Covestro-owned since January 2022 (Covestro acquired JSR's 30% stake for a "mid-single-digit million euros"). ~65 FTE. Zero recordable safety incidents since opening. Produces DeSolite UV-curable coatings for Japanese and Asia-Pacific fiber optic customers (Sumitomo Electric, Fujikura, Furukawa/OFS). One of the world's longest continuously operating fiber optic coating plants.
What else they do
Business segments
The company's full revenue map, where this supply-chain role fits within their broader business.
Performance Materials (MDI + TDI + Polycarbonate)
65%Solutions and Specialty (Fiber Optic Coatings + Coating Resins)
25%Adnoc Acquisition Context
10%
Intelligence
What's known
Sourced claims about this company's role in supply chains, chokepoints, concentration, incidents, dual-use connections.
Did you know2023
Covestro is simultaneously: (1) the company that coats >50% of the world's optical fiber — making it a structural pillar of global internet infrastructure; and (2) a major polycarbonate and polyurethane supplier whose materials are in car headlights, smartphone screens, foam mattresses, ski boots, and construction insulation panels. The fiber optic coatings business accounts for a small fraction of Covestro's €14.4B annual revenue but is among the most strategically concentrated supply relationships in the global technology supply chain. Very few people at Covestro work on fiber coatings; very few people at fiber makers understand that their coatings come from a polycarbonate company.
Covestro ↗Incident2020
Covestro assembled its fiber optic coating monopoly in 14 months through two transactions: first, the €1.61B acquisition of DSM's Resins & Functional Materials business (April 2021), which brought DSM Desotech's 40-year DeSolite IP portfolio, Elgin plant, and 70% of Japan Fine Coatings; then, just 9 months later (January 2022), the acquisition of JSR's remaining 30% stake in Japan Fine Coatings for a "mid-single-digit million euros." The Japan stake acquisition was essentially a rounding error in price — but it gave Covestro complete control of both the world's primary volume plant (Elgin) and the sole Japan-market fiber coating plant (Tsukuba), with no partner who could block decisions or exit.
Covestro ↗Origin2023
Covestro was spun off from Bayer AG's MaterialScience division in 2015 — making it the polymer chemistry legacy of the same company that invented aspirin (1897). Bayer's polymer history traces to 1937 when Bayer chemist Otto Bayer (unrelated to Friedrich Bayer, the company's founder) invented polyurethane by reacting isocyanates with polyols. Polyurethane synthesis was a WWII-era German chemical discovery; after the war, Bayer commercialized polyurethane for insulation, foams, and coatings globally. Covestro inherited this polyurethane legacy as MDI (methylene diphenyl diisocyanate) producer — one of only four companies globally that can manufacture MDI at commercial scale (alongside BASF, Huntsman, and Wanhua). In 2024, Abu Dhabi National Oil Company (Adnoc) agreed to acquire Covestro for approximately EUR 14.7 billion — a UAE state oil company acquiring the company that descended from the 1937 German polyurethane invention. The 87-year chemistry lineage from Otto Bayer's lab in Leverkusen to Adnoc's Abu Dhabi capital is one of the more unusual corporate genealogies in global chemistry.
Covestro AG ↗