About The Report
The bio based epoxy curing agents was valued at USD 319.6 million in 2025. Demand analysis is poised to surpass USD 344.8 million in 2026 at a CAGR of 7.90% during the forecast period. Investment is expected to push the market valuation to USD 737.5 million by 2036, driven by the strong performance of cashew nutshell liquid derivatives compared to traditional petrochemical amines, along with tightening VOC regulations that are accelerating their use in heavy‑duty coatings.
Formulators are currently forced to decide whether to maintain dual inventories for both petrochemical and bio-content hardeners or transition entire product lines to drop-in bio-based replacements. Retaining parallel product tracks fragments purchasing power and complicates compliance reporting under extended producer responsibility frameworks. Practitioners actively working with epoxy curing agents recognize that the green premium is rarely the primary purchasing trigger; these systems are adopted because phenalkamines actually cure faster at sub-zero temperatures than their conventional counterparts. Companies that delay full-line transition risk losing preferred supplier status as tier-1 end users standardize around lower-carbon specifications.

The transition toward fully integrated biomass-balance production operates as the gate for this industry. Once major chemical networks qualify waterborne coatings and bio-content curing agents across their primary marine and protective portfolios, the volume scale immediately normalizes the cost delta against legacy systems. The resulting cost parity effectively eliminates the last remaining operational friction, allowing applicators to switch systems without raising their own bid prices on large-scale infrastructure projects.
India is estimated to expand at 9.6%, supported by massive domestic availability of raw cashew feedstock intersecting with high-volume infrastructure demands. China follows at 9.2%, where heavy-duty industrial coatings formulators are actively replacing legacy hardeners to meet municipal emissions targets. South Korea tracks at 8.1%, propelled by its concentrated shipbuilding sector qualifying low-temperature cure systems. Germany is expected to post a 7.5% rate as European regulatory rules aggressively penalize high-VOC petrochemical variants. France registers 7.3%, driven by building materials procurement. Japan garners 7.1%, characterised by electronics encapsulation requiring high-purity biomass-derived resins. The United States advances at 6.8%, where adoption is highly localised to specialised composites rather than mass-market civil engineering. These regional differences mainly reflect how closely each area is connected to raw bio‑feedstock sources and the industries that rely on them, rather than a uniform global move in the same direction.
| Metric | Details |
|---|---|
| Industry Size (2026) | USD 344.8 million |
| Industry Value (2036) | USD 737.5 million |
| CAGR (2026-2036) | 7.90% |
Source: Future Market Insights (FMI) analysis, based on proprietary forecasting model and primary research
Bio-based epoxy curing agents are highly reactive chemical hardeners derived from renewable biomass sources, such as cashew nutshell liquid, vegetable oils, and lignin, used to crosslink epoxy resins into solid thermoset polymers. These agents replace traditional petrochemical polyamines and polyamides, providing the necessary active hydrogen sites for crosslinking while delivering specific operational characteristics like rapid low-temperature curing, superior moisture tolerance, and enhanced chemical resistance.
The scope of this analysis encompasses all commercially available curing agents synthesized primarily from renewable organic feedstocks intended for epoxy crosslinking. This includes phenalkamines, modified polyamides derived from dimerized fatty acids, amidoamines from vegetable oils, and emerging lignin-derived aromatics. The assessment tracks both 100% bio-based variants and hybrid specialty amine curing agents that achieve verifiable bio-content thresholds through biomass-balance mass accounting approaches.
Conventional petrochemical-derived curing agents, including standard diethylenetriamine (DETA) and triethylenetetramine (TETA) with zero renewable carbon content, are explicitly excluded. The baseline epoxy resin formulations themselves fall outside this scope, as the analysis isolates the market value and volume specifically tied to the hardener component of the two-part thermoset system.

The reason Phenalkamines / CNSL-based curing agents hold 34.0% of this market comes down to a single operational reality: marine and offshore applicators cannot absorb the curing delays associated with standard polyamides in cold, humid environments.
According to FMI's estimates, this chemistry is chosen because its long hydrophobic aliphatic chain naturally repels water during the crosslinking phase. Formulators using phenalkamines do not need to heavily modify their systems to achieve anti-corrosive properties, simplifying the manufacturing footprint. This advantage changes the buying criteria from simple cost-per-kilo to total applied cost, as drydock times are drastically reduced. Applicators who cling to legacy petrochemical hardeners for winter maintenance schedules face severe margin erosion due to extended labour requirements and weather-related curing failures.

Cashew nutshell liquid derivatives dominate with 38.0% share because the agricultural supply chain surrounding cashew processing generates this phenolic lipid as an abundant, highly reactive byproduct.
FMI analysts opine that, unlike engineered vegetable oils or complex lignin extraction processes, cashew nutshell liquid requires significantly less capital-intensive refinement to yield usable cardanol. This allows manufacturers to produce curing agents at a scale and price point that competes directly with synthetic equivalents. Formulators relying on this feedstock avoid the volatility of petrochemical pricing cycles while securing a reliable, drop-in reactive diluent substitute. Delaying the integration of cardanol-based systems leaves tier-2 manufacturers vulnerable to supply shocks when standard amine precursors face industrial shortages.

Formulators in the heavy industrial space are actively transitioning toward bio-based systems, enabling Protective coatings to capture a 31.0% share of the volume.
Based on FMI's assessment, the specific choice facing a steel coatings buyer right now is whether to continue defending legacy high-VOC systems against regulatory pressure or to adopt bio-based alternatives that inherently offer better flexibility and impact resistance. The naturally long aliphatic chains in bio-derived hardeners provide internal plasticization, which prevents the rigid epoxy matrix from micro-cracking under thermal cycling. This fundamentally changes how maintenance directors specify materials for bridges and offshore platforms. Formulators who fail to supply these compliant, high-build systems risk being engineered out of public infrastructure procurement frameworks altogether.

The sheer volume of flooring, grouting, and repair projects ensures Building & construction accounts for a leading 29.0% share.
As per FMI's projection, epoxy grouts and civil engineering polymers require hardeners that emit zero toxic fumes in confined spaces, a threshold that bio-based systems easily cross. Contractors working in operational commercial facilities or poorly ventilated subterranean infrastructure cannot utilize standard volatile amines without triggering severe occupational health shutdowns. The adoption of bio-based agents removes this operational friction, allowing simultaneous trade work alongside epoxy application. Sub-contractors who wait for further price drops in bio-materials face immediate exclusion from LEED-certified commercial development projects where indoor air quality standards are strictly enforced.

By 2026, Ambient / room-temperature cure applications represent 41.0% of the market, driven by the impossibility of applying thermal baking processes to massive assets. In FMI's view, the trajectory of this segment hinges on the ability of bio-based agents to rapidly crosslink without external heat, a critical requirement for field-applied adhesive films and civil repairs. The long-term change over the next decade involves reformulating even factory-applied systems to ambient cure to eliminate the massive energy costs associated with curing ovens. This change allows manufacturers to decarbonize both their material inputs and their direct energy consumption simultaneously. Operations clinging to heat-cure legacy systems forfeit their ability to bid on carbon-neutral manufacturing contracts.

The pressure of extended producer responsibility and tightening VOC regulations compels formulators of heavy-duty marine and industrial coatings to qualify low-emission crosslinking systems immediately. This transition forces tier-1 chemical procurement directors to replace traditional diethylenetriamine (DETA) variants with bio-derived phenalkamines or amidoamines that deliver necessary performance without the regulatory penalty. Retaining legacy petrochemical systems invites compounding compliance costs and restricts access to municipal and federal infrastructure contracts that now mandate sustainable material sourcing.
The recalibration of existing formulations creates a significant operational friction that slows adoption among smaller, regional coating manufacturers. Transitioning to a bio-based curing agent is rarely a simple one-to-one drop-in substitution; it requires adjusting stoichiometric mix ratios, recalibrating pot life expectations, and modifying application equipment. This technical barrier remains until massive chemical suppliers standardize their biomass-balance portfolios, meaning tier-2 applicators currently must invest heavily in proprietary R&D just to maintain their existing product performance baselines.
Opportunities in the Bio Based Epoxy Curing Agents Market
According to the regional analysis, the Bio‑Based Epoxy Curing Agents market is divided into Asia Pacific, Europe, and North America, covering more than 40 countries.
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| Country | CAGR (2026 to 2036) |
|---|---|
| India | 9.6% |
| China | 9.2% |
| South Korea | 8.1% |
| Germany | 7.5% |
| France | 7.3% |
| Japan | 7.1% |
| United States | 6.8% |
Source: Future Market Insights (FMI) analysis, based on proprietary forecasting model and primary research

The massive concentration of shipbuilding, structural steel fabrication, and electronics manufacturing across Asia Pacific dictates a rapid transition toward specialized bio-based crosslinkers. Rather than being driven solely by environmental policy, adoption here is heavily indexed to the proximity of raw feedstock, specifically the cashew processing hubs, which feed directly into regional chemical formulation. According to FMI's estimates, procurement directors operating in this region bypass the complex biomass-balance tracking preferred in the West, opting instead for direct, 100% bio-based phenalkamines that immediately solve high-humidity application challenges in tropical shipyards.
FMI's report includes secondary industrial markets across Southeast Asia, including Vietnam and Indonesia. A distinct pattern of capacity migration is occurring here, as epoxy resin industry analysis in asia pacific indicates that multinational formulators are establishing localized blending facilities directly adjacent to agricultural feedstock sources to insulate against trans-pacific shipping volatility.

Europe's aggressive implementation of REACH regulations and stringent chemical registration frameworks structurally forces formulators away from traditional high-toxicity petrochemical amines. FMI analysts opine that this policy-led environment changes the buyer's focus from simple performance metrics to verifiable supply chain transparency and carbon mass accounting. A procurement head operating in this region cannot simply source a functionally equivalent hardener; they must qualify systems that satisfy internal corporate targets and municipal green-procurement laws simultaneously.
FMI's report includes the Nordic countries and the United Kingdom, which represent mature end-user markets. The growth in these adjacent zones is characterized by a rapid phase-out of conventional solvent-borne epoxy systems in favour of advanced, water-reducible bio-amine technologies.

In North America, the adoption of bio-based curing agents is determined by performance-led economics rather than uniform environmental legislation. Formulators adopt these chemistries only when they solve specific operational failures, such as adhesion loss on damp concrete or insufficient flexibility in composite structures. As per FMI's projection, the sheer scale of the region's ageing infrastructure creates a massive, albeit fragmented, opportunity for specialised field-repair polymers where environmental conditions cannot be controlled.
FMI's report includes Canada and Mexico, where market dynamics are closely tied to cross-border manufacturing operations. A pattern emerging across these markets involves heavy-duty automotive and aerospace composite fabricators leveraging bio-based epoxy casting potting resin to meet specific internal lightweighting and thermal resistance targets.

Bio based epoxy curing agents industry exhibits moderate concentration at the top tier, driven by the capital requirements of specialized bio-feedstock extraction and the massive scale needed for verifiable biomass-balance accounting. Leading companies such as Cardolite Corporation, Evonik Industries AG, and BASF SE control significant volume because they offer complete, globally supported portfolios rather than isolated specialty products. Buyers in the heavy industrial and marine sectors use global supply reliability and consistency of batch-to-batch curing profiles as the primary variables to distinguish qualified partners from opportunistic regional toll-blenders.
The advantage held by incumbents lies in their vertically integrated supply chains or their deeply entrenched mass-balance chemical networks. Companies like Westlake Epoxy and Huntsman Corporation possess the regulatory architecture and the formulation expertise to synthesize highly consistent fatty amines and amidoamines at scale. To replicate this, a challenger must build not just a novel extraction process, but an entire qualification matrix that tier-1 coating manufacturers trust enough to drop into their flagship global product lines.
Through 2036, the tension between massive protective coating brands demanding lower prices and chemical majors protecting their margins will define the evolution of the market. Large buyers actively resist lock-in by designing their specifications around standardized bio-content thresholds rather than proprietary single-source molecules. This dynamic ensures that while the top tier remains highly capitalized, the market will not fully consolidate, as regional formulators leveraging local agricultural streams continue to capture localized infrastructure projects.

| Metric | Value |
|---|---|
| Quantitative Units | USD 344.8 million to USD 737.5 million, at a CAGR of 7.90% |
| Market Definition | Bio based epoxy curing agents are highly reactive chemical hardeners derived from renewable biomass sources-such as cashew nutshell liquid, vegetable oils, and lignin-used to crosslink epoxy resins into solid thermoset polymers. Functionally, these agents replace traditional petrochemical polyamines and polyamides, providing the necessary active hydrogen sites for crosslinking while delivering specific operational characteristics like rapid low-temperature curing, superior moisture tolerance, and enhanced chemical resistance. |
| Chemistry type Segmentation | Phenalkamines / CNSL-based curing agents, Modified polyamides, Amidoamines, Modified cycloaliphatic amines, Waterborne bio-content curing agents |
| Bio-feedstock source Segmentation | Cashew nutshell liquid derivatives, Vegetable oil derivatives, Lignin-derived aromatics, Vanillin / furan derivatives, Biomass-balance feedstocks |
| Application Segmentation | Protective coatings, Adhesives & sealants, Composites, Flooring & civil engineering, Electrical encapsulation |
| End use Segmentation | Building & construction, Industrial & marine coatings, Wind energy & composites, Automotive & transportation, Electronics & electrical |
| Regions Covered | Asia Pacific, Europe, North America |
| Countries Covered | India, China, South Korea, Germany, France, Japan, United States, and 40 plus countries |
| Key Companies Profiled | Cardolite Corporation, Evonik Industries AG, Westlake Epoxy, BASF SE, Huntsman Corporation, Aditya Birla Chemicals, Mitsubishi Chemical Group |
| Forecast Period | 2026 to 2036 |
| Approach | Primary research targeted chief formulators, product development directors, and procurement heads at tier-1 industrial coating and adhesive manufacturing firms. The baseline volume was anchored directly to regional cashew production outputs and commercialized dimer fatty acid supply chain capacities. Forecasts were cross-validated against independent production declarations from the top five global epoxy amine producers. |
Source: Future Market Insights (FMI) analysis, based on proprietary forecasting model and primary research
End use:
This bibliography is provided for reader reference. The full FMI report contains the complete reference list with primary source documentation.
The industry size is expected to reach USD 344.8 million in 2026. This baseline valuation reflects the immediate, high-volume substitution of petrochemical polyamides in marine and industrial coatings, where performance parity has already been achieved by agricultural derivatives.
Continued investment is projected to lift the market valuation to USD 737.5 million by 2036, supported by the wider implementation of biomass‑balance mass accounting that enables major chemical producers to bring change in entire supply chains without overhauling existing infrastructure.
A compound annual growth rate of 7.90% is expected during the forecast period. This rate is structurally dictated by the capital expenditure cycles of civil infrastructure and marine shipbuilding, rather than moving strictly in lockstep with corporate announcements.
Phenalkamines / CNSL-based curing agents lead the market. Their dominance is driven by an inherent chemical structure, long hydrophobic aliphatic chains, that physically repels moisture during the crosslinking phase, making them indispensable for damp, field-applied heavy-duty coatings.
Cashew nutshell liquid derivatives capture the primary volume share. Unlike highly engineered alternatives, raw cardanol is an abundant byproduct of an existing agricultural process, bypassing massive synthetic refinement costs and allowing manufacturers to deliver drop-in systems at competitive price points.
Protective coatings account for the leading share of applications. Applicators require hardeners that provide intense anti-corrosive properties and internal plasticization for structural steel, forcing a direct switch to flexible, low-VOC bio-based amidoamines to prevent brittle failure.
Stringent VOC regulations and extended producer responsibility frameworks physically penalize the use of synthetic, solvent-heavy crosslinkers. Procurement directors are forced to standardize around high-solids, bio-based alternatives to maintain their approved vendor status with major municipal and structural contractors.
The recalibration of existing formulations creates massive technical friction. Smaller applicators cannot simply swap a petrochemical amine for a bio-based agent; they must heavily invest in adjusting mix ratios, testing viscosity, and altering spray equipment to achieve the required application profile.
India expands at 9.6%, followed by China at 9.2%. India's trajectory benefits from massive domestic access to raw cashew byproduct, allowing regional formulators to bypass global supply chain import constraints and dominate heavy-duty infrastructure bids locally.
The aggressive implementation of REACH and extended producer responsibility laws actively penalizes legacy synthetic hardeners. This policy-led environment forces tier-1 chemical brands to adopt certified biomass-balance inputs simply to maintain access to commercial construction and marine procurement networks.
The maturation of water-reducible bio-hardeners enables the total elimination of solvent usage in confined spaces. Once these zero-odor, high-performance systems are fully qualified by major coatings brands, the last remaining health and safety friction in civil engineering application is removed.
Incumbents leverage massive, vertically integrated biomass-balance networks that tier-2 formulators cannot easily replicate. They secure the market not through niche proprietary molecules, but by offering absolute global supply reliability and verifiable bio-content certification across massive volume lines.
Standard petrochemical polyamides fail to crosslink efficiently in sub-zero, high-humidity environments, causing severe operational delays in drydocks. Phenalkamines cure rapidly under these exact conditions, providing an immediate commercial benefit that heavily outweighs their initial material premium.
While lignin is highly renewable, extracting and refining it into a consistently reactive amine substitute requires extreme capital investment. Until extraction yields and batch-to-batch consistency improve, formulators will continue to rely on the more stabilized economics of cashew and vegetable oil derivatives.
It allows large chemical plants to blend renewable feedstocks with conventional inputs, verifying the renewable portion mathematically rather than physically separating production streams. This lets global adhesive brands adopt bio‑content without changing any factory mixing protocols.
Unlike Europe's uniform regulatory push, U.S. adoption is dictated strictly by functional performance. Asset managers specify bio-based systems primarily for specialized infrastructure repairs where surface-tolerant, all-weather application is non-negotiable, treating the bio-content as a secondary feature.
Commercial flooring and structural grouting projects operate under severe time penalties for facility downtime. Bio-based hardeners that can deliver rapid crosslinking without relying on hazardous accelerators allow contractors to bid on fast-return-to-service projects inside operational buildings.
South Korea's massive concentration of tier-1 shipyards creates a localized surge for low-temperature curing agents. The procurement of CNSL-derivatives tracks directly with winter vessel maintenance schedules, allowing yards to clear vessels faster than competitors using standard chemistries.
The intense miniaturization of semiconductor packaging requires potting compounds that resist thermal shock. Specific, highly purified bio-amidoamines provide the exact crosslinking density and internal flexibility needed to prevent micro-fractures without introducing ionic contaminants.
While chemical majors dominate mass-balance volumes, large industrial buyers actively resist sole-source lock-in by designing their procurement specifications around standardized bio-content thresholds. This allows regional formulators leveraging local agricultural streams to remain competitive in localized bids.
Because phenalkamines are directly tied to the agricultural output of the cashew industry, poor harvest yields or disruptions in cashew nut processing immediately spike raw cardanol costs. Specialty formulators must secure multi-year off-take agreements to insulate their margins against this agricultural volatility.
The designation of "bio-based" will cease to be a premium, isolated product category. Because biomass-balance feedstocks will be deeply integrated into all standard amine synthesis, bio-content will become the default baseline performance standard for all new epoxy formulations globally.
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