LignoSphere, a Finnish startup converting wood-processing waste into materials for industrial adhesives, closed a pre-seed round exceeding €1.2 million, the company announced. Kiilto Ventures and Stephen Industries led the financing, with TekVentures—the newly formed investment arm of U.S. chemicals manufacturer Teknor Apex—joining as the round expanded from its initial close in May.
The Espoo-based company transforms lignin, a byproduct of pulp and paper mills, into spherical particles for bio-based coatings and adhesives that replace petroleum-derived ingredients in epoxy adhesives and protective coatings. It also secured a research loan from Business Finland that extends through June 2027, according to a company statement.
Kiilto Ventures and Stephen Industries first committed capital May 20. Teknor Apex entered three months later, shortly after TekVentures publicly launched its fund on August 13 with LignoSphere among its disclosed holdings in bio-based materials.
A Technical Bet on Industrial Waste
The company produces colloidal lignin particles that can displace bisphenol A and as much as half the fossil-based content in epoxy formulations, its website states. LignoSphere claims the substitution achieves cost parity with conventional ingredients. In testing, the startup's adhesives reached shear strengths above 10 newtons per square millimeter on metal, concrete, and wood, performance figures the company disclosed in May.
Potential applications span structural adhesives for engineered timber, anticorrosion coatings for metal, and protective systems for concrete infrastructure. The company holds seven patents on the technology. A LinkedIn update indicates LignoSphere is shipping large batches to 10 industry partners for field trials.
From Lab to Market
LignoSphere emerged from research at Aalto University and Häme University of Applied Sciences. Chief technology officer Kalle Lintinen, a former Aalto researcher, developed the underlying lignin nanoparticle process. Alexander Henn, who earned his doctorate at Aalto and now heads R&D, published peer-reviewed studies on lignin coatings before joining the venture. Pekka Oinas, an Aalto professor, oversees engineering. CEO Eero Knuutila leads a team of roughly five employees, based on LinkedIn profiles.
The leadership's academic pedigree reflects a common pattern in Nordic deeptech: university breakthroughs commercialized through spinouts backed by local industry players with strategic stakes in the outcome.
Strategic Capital, Strategic Motives
Kiilto Ventures invests on behalf of Kiilto, a Finnish chemicals group with operations across adhesives and construction materials. Stephen Industries, a Finnish family office, focuses on greentech and deeptech ventures.
"The team worked incredibly hard during our accelerator program, proving the demand for high-performance alternatives on the market," Christopher Mills of Kiilto Ventures wrote on LinkedIn in June. The comment hints at validation that went beyond pitch decks.
Teknor Apex, founded in 1924, established TekVentures this year to fund pre-seed through Series A companies working on materials and manufacturing innovations. Abhijit Ganguly, the fund's managing director, noted in September that "lignin's promise is clear: it is renewable, abundant, and already produced at industrial scale." That last point matters. Unlike some bio-based feedstocks that require new supply chains, lignin comes out of existing mills by the ton.
Regulatory Tailwinds
LignoSphere is entering a global adhesives market that research firm S&P Global sized at roughly $52.8 billion, with the epoxy segment accounting for an estimated $8.8 billion to $10.8 billion of that total. Regulatory momentum is building. The European Union banned bisphenol A in food-contact materials in December 2024, a move that has rippled through adjacent product categories as manufacturers anticipate broader restrictions.
Established players are already shifting. UPM, the Finnish forest products company, has substituted lignin for at least half the phenol in its WISA BioBond plywood adhesives since 2022. Westlake Epoxy has pursued mass-balance certification for bio-attributed resins. The LIGNICOAT consortium, which includes Westlake, has worked since 2021 on lignin-based epoxy and alkyd resins for coatings applications.
Whether LignoSphere can compete on performance and scale remains an open question. The company aims to complete Business Finland-funded pilot projects for metal and concrete coatings by mid-2027, after which it plans to ramp production.
CEO Knuutila highlighted Teknor Apex's manufacturing track record. "They have spent a hundred years doing exactly what we are aiming for: manufacturing materials at industrial scale," he said in the September announcement. It's a pragmatic observation. Lignin chemistry is well understood; turning it into a drop-in replacement that adhesive formulators will actually use is another matter entirely.
